Archive of Our Own

Izuku really didn’t know how they found themselves in this position. He didn’t even know who threw the first punch anymore, just that his knuckles were bloody and throbbing in a way that made him seriously consider going to see Recovery Girl after this, despite the punishment that would most likely result from it. He was panting and his shirt was sticking to him with sweat that cooled his heated skin in an uncomfortable way – but it wasn’t any more uncomfortable than scraping his knees on the dirty ground and dragging his bruised and bloody palms over the pavement as he crawled towards Kacchan. 

Okay, maybe Izuku should have thought this through. Maybe he shouldn’t have let Kacchan piss him off so much and goad him into this fight. Maybe – just maybe – he shouldn’t have used One for All at more than his usual five percent and then maybe none of this would have happened. As it was, Izuku was a fucking idiot and he acted without thinking and he let his emotions get the best of him when it came to Kacchan, as always, and now he was paying the price for his reckless stupidity. Or maybe Kacchan was paying for it. It was really hard to tell which of them had it worse, considering Kacchan’s head was bleeding profusely all over Izuku’s lap. 

“Oh, shit, Kacchan I’m so sorry!” Izuku exclaimed as cold dread seized him by the throat. What if he couldn’t wake Kacchan up? What if he permanently damaged something in his head with that last kick and now Kacchan’s skull was cracked and he wasn’t actually unconscious, but Izuku was holding his friend’s dead body right now. “Kacchan?” He pushed Kacchan’s shoulder tentatively and almost yelped when Kacchan practically rolled over. That couldn’t be good. 

Izuku tried to steady his breathing, but that was a difficult task even without the growing panic that was settling in his head and lungs and stomach and rendering his entire body as useless as jelly as he tried to heave Kacchan up. He could already see it all – his status as a hero revoked on account of him being an unhinged murderer, All Might’s disappointed face as he took back One for All because Izuku wasn’t fit to carry on the legacy of the Symbol of Peace, his mom – his poor, worry ward mom – looking at him with tears in her eyes but speechless and with no comfort to offer. He didn’t even want to think about what Kacchan’s parents would do to him.

And Kacchan – worst of all, how could Izuku live without Kacchan? Especially knowing he was the one who did him in? Shit. 

Just as Izuku was planning a much too elaborate plan to escape not only the school grounds but also the country, Kacchan moaned and turned his head. Izuku looked down, his breath catching in his throat as Kacchan stirred on top of him. 

“Kacchan?” He asked again, his voice low and tentative. Kacchan scrunched his eyebrows in the cutest way possible and after a moment of struggling to open his eyes, he finally peeled them apart and looked up at Izuku. He must have really been out of it from that impact, because he didn’t even complain that his head was currently pillowed on Izuku’s thigh. Or maybe he didn’t notice.

“Wha’ happened?” Izuku wondered if he should be concerned about Kacchan’s slurred speech or if he could in good conscience attribute it to drowsiness. 

“You hit your head.” He lied. But it wasn’t like he could just come out and say he hit Kacchan’s head and made him pass out. “Don’t move too much, you might have a concussion.” 

But Kacchan was already sitting up and pushing away from Izuku and stumbling to his feet. Izuku didn’t expect it – how could he, when Kacchan was so unsteady and so disoriented he didn’t even seem to remember why they were here? – so he didn’t have time to react or move or even blink before Kacchan’s knee connected with his face. A sickening crunch rang out in the air, so loud it even drowned out the pain, but only for a moment. And then it split across Izuku’s head like a hatchet ripped his skull in half – he fell to the ground in agony and clutched his face with both hands, hoping to somehow minimize whatever damage Kacchan did to him by physically keeping his face from falling apart. 

His palms quickly grew wet and Izuku knew he was bleeding, probably badly, but he couldn’t tell if his nose was just broken or completely detached from the rest of him. He really hoped it was the former, because he didn’t want to spend the night looking for pieces of bone and skin and who knows what else. He thought the fact that was what he was worried about right now was maybe a good sign. 

“You broke my nose!” He exclaimed in horror and looked at Kacchan with wide, betrayed eyes. Sure, they came here to beat the crap out of each other in the first place and Izuku did say he would help Kacchan work through his emotions, but this wasn’t really what he had in mind. 

“Serves you right, you asshole!” Kacchan snapped at him. He looked unsteady on his feet, his balance wobbly and uneven, like he was one wrong step away from kissing the pavement. “You gave me a fucking concussion!”

Izuku wanted to argue that a concussion was far preferable to having your nose peeled right off your face, but he didn’t think that reasoning would go over very well right now. The funny thing was, he was so pissed off about Kacchan’s audacity, he barely even felt the pain anymore. He moved his hands from his face slowly and stood up. He was dizzy – either from the blood loss or from the blow, he wasn’t sure – but he thought he was probably more steady than Kacchan was, which meant it was easy for him to jump on Kacchan and tackle him to the ground. In the moment he forgot about Kacchan’s possible concussion and about his emotional turmoil and about all the tears and all the curses and insults Kacchan threw at him earlier, and he let out all of his own rage. 

Because Kacchan wasn’t the only one affected by what happened and Izuku had to stop pretending like all of it wasn’t killing him. Ever since Kacchan got kidnapped he felt like he couldn’t breathe and when they finally brought him back, safe and alive and unhurt for all anyone could see, Izuku thought that the pressure sitting on his chest would lessen. He thought he would be able to sleep again without nightmares of snatching hands and terrified eyes and Kacchan slipping away from him waking him. He thought that after all that, he would finally be able to say this is over . Instead, he was plagued with terrors even worse than the ones he suffered through while Kacchan had been missing and they kept him awake day and night, to the point he was hesitant to even close his eyes or blink for too long because those images were tattooed to his eyelids permanently. 

And maybe Kacchan wasn’t the best person to take this out on, but he was the only one here and he was the one who initiated this whole thing. At this point Izuku was also pretty sure Kacchan was the one who threw the first punch earlier. So he didn’t hesitate when he punched him in the jaw, although he did it without using his quirk this time. He couldn’t see it in the dark, but he knew a bruise was already blooming where his knuckles met Kacchan’s bone and he couldn’t find it in himself to be sorry for it. 

“You know you didn’t have to be such an asshole about this.” Izuku said as he grabbed the front of Kacchan’s shirt and pulled him up. Kacchan was so limp that Izuku thought he passed out again, but when he blinked away the spots swimming in his vision, he saw that Kacchan was glaring at him. Even if his eyes did seem a little too blank and dazed to really be considered glaring. 

“You’re the… fucking asshole, asshole.” In different circumstances Izuku might have found that lame comeback concerning, but considering what they were doing, he thought Kacchan’s effort at the back talk was admirable. 

“I was doing you a favor.” Izuku said through gritted teeth. He didn’t even try to move away when Kacchan swung at him again, and he didn’t flinch, even if the punch to his chest left him surprisingly breathless. 

“By beating my ass?” Kacchan muttered.

“You beat my ass just as bad.”

“I’ll fucking… beat your ass into the ground.” The words were slurred and Izuku got concerned for a moment, until he realized the reason for it was that Kacchan’s mouth was filled with blood. He realized this in the same moment he realized what Kacchan was doing – a mix of spit and blood splattered across Izuku’s face and he instinctively opened his mouth on a groan, which was a mistake because Kacchan’s bloody spit landed on his tongue. 

“Gross!” He yelled and then, without even thinking about it, he smacked Kacchan across the face with the back of his hand. The resulting crack and Kacchan’s head flying back from the impact would have left Izuku feeling guilty and concerned, if it weren’t for the fact that Kacchan recovered immediately and already had a firm grip on Izuku’s hair. 

Izuku cried out as Kacchan pulled on his hair like he wanted to rip his head from his shoulders. He tried squeezing Kacchan’s wrist to get him to let go but it only made him hold on tighter. Izuku tried to pry himself away from Kacchan’s hands but the more he moved the more painful it was and tears were already springing in his eyes. Blood was still running from his nose like a faucet and he was starting to feel dizzy from it – maybe that was concerning, but right now Izuku just wanted Kacchan’s hands away from his hair and he couldn’t focus on much else.

“Kacchan, let go!” He yelled.

“No! Fuck you!”

Izuku groaned in exasperation and finally let go of Kacchan’s wrist, but only so he could use both hands to shove him away. Since he was already kneeling on top of Kacchan, this meant Izuku’s push made him hit the pavement hard. Kacchan groaned in pain and blindly grabbed for Izuku, his nails scraping at the back of Izuku’s neck as he spit out nonsense and curses. Izuku felt slowed and disoriented, and he blamed the many blows he received from Kacchan for his lack of reaction and his inability to realize what was happening. Because the next thing he knew, everything was spinning, only the dizziness was inside his head and Izuku was the one who was spinning, and suddenly he was a lot closer to Kacchan’s face than he had been and he didn’t know what the hell possessed him or why he did it – maybe he wanted to do something drastic neither of them could walk away from or take back, or maybe he secretly had a death wish or his brain was really so rattled he would never think straight again. 

Whatever the case, Izuku’s sudden and inexplicable stupidity lasted long enough for him to grab Kacchan’s head with both hands and then smash their lips together. 

As soon as he did it he started screaming at himself inside his head, because there was no way he would live to tell this to anyone. There was no way Kacchan would let him walk out of here with all his limbs intact and there was definitely no way that Izuku would wake up in the morning. He would probably be murdered mysteriously in his sleep and only Kacchan would know what really happened to him. And really, whatever gruesome punishment Kacchan came up with, Izuku knew it would be well deserved. 

Except Kacchan wasn’t blowing up his face or any of his vital organs and pushing him away. He wasn’t even passed out and limp under Izuku, which would explain why Izuku was still in one piece and breathing. Instead, Kacchan was actually kissing him back . Now Izuku was certain that both of them suffered a serious head injury that made them lose all common sense and the ability to think rationally, because there was no world or dimension or alternate reality in which he got to kiss Kacchan and his face wasn’t blown off. Izuku had filled up an entire notebook trying to think of a scenario in which it would be possible for him to ever get this close to Kacchan and actually walk away from it, and the only conclusion he came to was that it just wasn’t possible and it never would be. 

So the fact he was sitting here covered in blood and dirt and spit and sweat and kissing Kacchan could only mean that he was either dead or so severely brain damaged that he was beyond help, which was just as bad as actually being dead. 

But the physical evidence of this being real was right there, in Kacchan’s teeth clanking against Izuku’s and in his hands grabbing at Izuku’s hair, in a completely different way than just a moment ago. It was there in the way Kacchan pulled Izuku against him and was panting into his mouth even as the blood pouring from Izuku’s nose smeared over both their faces. And Izuku had no choice but to grab Kacchan just as hard and just as firmly and kiss him with the same desperate enthusiasm that was quickly sucking the breath out of both of them. Izuku’s lungs felt like they were on fire for several reasons – the most prominent being that Kacchan seemed determined to use up all of Izuku’s air supply and Izuku was happy to sacrifice it if it meant he got to keep kissing Kacchan. 

They grabbed at each other desperately with stiff, bleeding fingers, clutching onto bare skin and half-torn shirts and trying to get the footing they needed to get as close as they possibly could to each other. The ground was their biggest enemy because it was far too slippery to provide any kind of purchase, but Kacchan didn’t seem too bothered by this; he was too busy trying to shove Izuku’s shorts down over his ass. Somehow, despite the position they were in and despite what they were doing, it felt inappropriate that Izuku’s hard dick was pressing into Kacchan’s hip. He couldn’t help how embarrassed he felt over it, or how his face felt hot from shame and some other things that Izuku didn’t know how to name. 

He didn’t get to say anything about it though, because by the time he managed to collect his thoughts, Kacchan also succeeded in what he was doing, and now Izuku’s pants were firmly pushed under his ass and Kacchan was gripping his ass cheek like he had no shame to spare for the scandalous action. Seriously, how could he be so nonchalant about this? The traitorous thought that maybe this wasn’t as new to Kacchan as it was to Izuku, that maybe he’s already done this with someone else before, slithered into his brain and pricked him like a poisonous snake. Izuku could hardly enjoy the feeling of Kacchan’s hands kneading his ass when those hands probably already touched a bunch of asses before his. 

Kacchan seemed to notice his hesitance even in his own haze. He broke their kiss and breathed out through his mouth, looking up at Izuku curiously. But there was something more behind those eyes that Izuku couldn’t pinpoint. Maybe it was Kacchan’s sense returning to him, or maybe it was panic or something else entirely. 

“What’s wrong?” He gasped, sounding so unlike Kacchan that Izuku had a hard time focusing on how ridiculous that question was.

“Nothing, I–” Just that one word seemed to be enough for Kacchan – before Izuku even finished talking, Kacchan was attacking him with kisses again, this time more forceful and more determined. Izuku had no choice but to reciprocate and he decided not to worry about stupid things. Even if Kacchan did do this with someone else before, Izuku couldn’t change that, and why should that mean they couldn’t do it now?

With that resolution pushing him forward, Izuku reached between them and ripped Kacchan’s pants down just enough to expose his dick. And then, in a moment of either reckless bravery or complete idiocy, he wrapped his fingers around Kacchan’s dick without looking. He immediately noticed two things – one, Kacchan was hard . His dick felt almost like rock in Izuku’s hands, and he wasn’t sure if his fingers were just that stiff or if touching someone else’s dick felt so different from his own that it made his movements sloppy and uncoordinated. Two, he was hot. Really, really hot. Every bit of Kacchan’s exposed skin was searing hot against Izuku, so hot that it made him wonder if Kacchan was running a fever. Considering the nasty injuries he was sporting, it probably wouldn’t be the most surprising thing in the world. 

The last and most important thing Izuku noticed was how his touch made Kacchan react. It made little sense to his rattled brain, but Kacchan cried out like he was shocked – literally electrocuted – and his hips came flying off the ground as much as they could with Izuku pinning them down, and his head fell back in an unnatural arch that looked quite painful. Izuku was so mesmerized by Kacchan’s expression he almost forgot what he was supposed to be doing. But, not wanting to be the only one giving something and not getting anything in return, he quickly readjusted his legs around Kacchan. He propped himself up on one hand and used his other one to take hold of his own dick, and then Kacchan’s, squeezing them both between his fingers. It was a tight fit, Izuku could barely close his fingers around his own dick alone, let alone with Kacchan’s pressed against it, but he managed it. 

And as soon as he did he realized just what he managed to do and he almost came on the spot. Kacchan was panting like a bitch under him, licking into Izuku’s mouth like he was enjoying the taste of his blood. He knew he should be grossed out by that but it only turned him on more and spurred him to move. He didn’t start off slow or gentle, they were both way past the point of being careful with each other. So he immediately pressed his hips down with the same force and aggression he used earlier to punch Kacchan in the face, and Kacchan did the same. He tightly wrapped one leg around Izuku to keep him close and lifted his hips each time Izuku pressed down. Soon the late night silence around them was broken by the sound of them panting and groaning into each other’s mouth, and their slick cocks sliding together in Izuku’s hand. 

He was surprised at how wet they both were and how quickly they got there, but he didn’t waste precious thoughts wondering about it when he knew his focus was better spent on trying to push both of them over the edge. Despite the fact he never did something like this before – except in the privacy of his own room, when he hoped everyone who might hear him was already fast asleep – Izuku found that he had a natural instinct for how to move. Maybe he was just horny and chasing his own pleasure without much regard for Kacchan’s, but it didn’t seem to bother the blond. In fact, the longer Izuku moved on top of him, the more enthusiastic he became. His groans quickly turned to needy, high pitched whines and Izuku couldn’t hold his own sounds in for much longer either. He let his head hand forward as his instincts completely took over and he thrust his hips up and down repeatedly, urged by the wet squelch between their legs and Kacchan’s unsteady breathing in his ear. 

They were rutting against each other mindlessly, each chasing their own release without another thought except the building pleasure and the need to release their emotions in some way that didn’t involve pummeling each other. Or at least, not the sort of pummeling they did until now. Izuku was glad to notice Kacchan was just as desperate for this as he was, and he seemed just as close. 

He wasn’t sure which of them fell over first – maybe it was Kacchan, when his hips jerked up once and his head shot back and his eyes rolled into his head for such a long time Izuku was sure he blacked out. Warm, sticky liquid spurted from the tip of his cock and over Izuku’s bloody palm, providing extra lubrication as he continued to move his hand. Izuku’s orgasm hit him at almost the same moment – his movement faltered for a second and his hips stuttered at the same time his breath did, and then he was spilling into his own hand and all over Kacchan’s twitching abdomen. He kept moving his hand until he forced all the cum out of himself and even then he didn’t stop, not until Kacchan whined and twitched helplessly under him and tried to push him away. It was such a weak attempt that Izuku barely noticed it. 

He pushed himself up onto shaking hands and looked down at Kacchan, or rather at the mess between them. Where he expected to see clear white cum, Izuku was surprised to find a pinkish substance covering Kacchan’s stomach. It took him a second to realize that it was their cum mixed with Izuku’s blood. He looked down at his hands and saw that the cuts on his palms were quite a bit deeper than he realized at first. He probably should have felt grossed out by the sight, but he took it in stride. Especially when he saw the rest of Kacchan – his entire face was covered in smeared and drying blood, some of it his own, most of it Izuku’s. There was a lot of bruising and a whole lot of swelling on his face too. He was staring up at Izuku almost placidly and Izuku wondered if he was just tired from the fight and the… Whatever this was, or if he was so shocked at what happened he checked out mentally. 

Slowly, painstakingly, Izuku pushed himself up onto wobbly feet and pulled his pants up to hide his dick from Kacchan’s piercing eyes. Then he reached down and pulled Kacchan to his feet, surprisingly without any resistance from him. Maybe that was because Kacchan was still completely unsteady on his feet though, and he ended up leaning onto Izuku – or falling onto him – so much that Izuku could barely walk straight himself. Even though his entire body protested it, Izuku ended up picking Kacchan up and hoisting him onto his back so he could carry him. Kacchan still didn’t complain, he just leaned his head against Izuku’s shoulder and sighed out heavily. 

They walked for almost ten minutes without either of them saying a single word and Izuku was already starting to think Kacchan fell asleep, when he felt his hot breath against his ear. 

“I hate you.” Kacchan muttered, and then he went completely still and silent.

Izuku sighed heavily. Yeah. He kind of hated himself, too. 

Guilt and shame pricked at the back of Izuku’s neck in the following days as he and Kacchan served their punishment. It was too hopeful of him to think their late night rampage on the school grounds would go unnoticed or unpunished. They didn’t even make it back to the class A dorm building before they were stopped in their tracks by a very pissed off looking Aizawa. Izuku had to scramble to let Kacchan down off his back, which resulted in both of them stumbling and almost falling on their faces. Not to mention that Aizawa’s binding cloth was not something he wanted to feel wrapped around the open gashes in his skin. 

After an hour-long lecture from their homeroom teacher and All Might trying to defuse the situation in their defense, they were let off the hook, but only barely. The consequences of their fight were a three day suspension for Izuku and a four day suspension for Kacchan since, as it turned out, he really was the one who threw the first punch. It was all such a blur to Izuku that he would have gone on not knowing who started what if he wasn’t told. Even though the matter of who started the fight was put to rest, Izuku still couldn’t figure out which of them started the other thing. On top of being suspended, they also weren’t allowed to get their injuries healed with the help of quirks – aside from the most concerning damage, which was Izuku’s broken nose and Kacchan’s concussion, Recovery Girl only bandaged most of their cuts and bruises. Still, Izuku decided to take the small victory of at least having his nose mended, because that definitely wouldn’t have been a fun few weeks for him. 

Izuku spent that night restless and not sleeping, his head plagued by images of Kacchan crying, Kacchan falling to the ground and clutching his chest as he struggled for breath and for words. Then the wound on Kacchan’s head after Izuku kicked him, and the fear that he did something permanent and irreversible that he would have to live with, the fear that he lost Kacchan as he knelt over his unconscious body. And then… Then there were the images of Kacchan’s lips on his, of his teeth scraping against Izuku’s skin like Kacchan wanted to suck  his tongue right out of his mouth. The sight of his overwhelmed face and his eyebrows scrunching together with determination and then pleasure, and the feeling of their hot skin pressing together over and over and over.

Those were the images that ultimately kept Izuku awake, and for the rest of the night he battled against himself, feeling dirty and inappropriate because he could barely keep his hands out of his pants. He welcomed the dawn gladly, because it was finally an appropriate time to get out of bed. Even though he was far too sore and far too bruised to even dream of doing his training routine today, Izuku still went over his morning like he always did. He got ready for the day and then went downstairs to eat breakfast despite his lack of appetite. His stomach still turned every time he remembered the sickening crunch that echoed when his foot connected with Kacchan’s head. 

Izuku fought off a shiver and busied himself by preparing his meal. As he expected, the common area was completely empty at this hour. Everyone else would be up soon though, because unlike Izuku, they actually had to go to class today. The reality of what he did yesterday crashed into him all over again, leaving him breathless on impact. He would have to miss three days of class because of this. A part of him couldn’t even be mad about it, not when he knew Kacchan had needed his help badly and Izuku was the only one who could have given it to him. He couldn’t hold it against himself that he decided Kacchan’s well being was more important to him than any punishment that would result from their fighting. What he mostly felt bad about was that Kacchan would have to miss school because of this, too. 

He was so lost in his thoughts that he didn’t notice when something in his presence changed – he couldn’t tell what it was at first, only that the air around him seemed different and that something felt off . When he whipped around, he was shocked to find Kacchan standing right behind him, staring at him. Maybe he shouldn’t be that surprised about it. They were both serving the same punishment, after all, and Izuku could imagine Kacchan probably had a similar night to his. That thought brought on a flood of other, far more indecent thoughts and Izuku had to scramble to get away from Kacchan in case he got a boner. 

“Good–good morning!” He squeaked nervously. “You’re up early.” He immediately wanted to kick himself for stating the obvious like a moron. Kacchan would probably be annoyed with him right off the bat, which would be completely deserved anyway, not only because of Izuku’s incompetence to hold a proper conversation, but also because of everything else.

“I didn’t sleep.” Kacchan said flatly. 

Oh. 

Shit. 

Izuku couldn’t help it when his mind started reeling, wondering if the reason Kacchan didn’t sleep last night was the same reason he didn’t sleep a wink. There was no way Kacchan laid awake all night thinking about Izuku, though, and there was even less chance that he had to spend the entire night fighting with himself over the horrible need to jerk himself off to the memory of what happened between them. No, there was no way any of that was true. Kacchan probably just couldn’t fall asleep because he was in pain, or too sore, or just too worked up from the adrenaline. Definitely not because thoughts of Izuku were keeping him awake. 

“Oh.” Izuku breathed out and then bit his lip. “Sorry about that. Guess we were both too wound up to sleep much.” He commented. 

Kacchan raised an eyebrow at that and took a barely noticeable step forward. Except Izuku definitely noticed it and now he was hyper aware of how close they were standing together and how little space there was in this tiny kitchen to begin with, and how Kacchan’s pupils seemed far too dilated to be natural, and all of a sudden Izuku couldn’t remember how to breathe. 

“You were wound up too?” Kacchan asked in a tone that Izuku didn’t know how to describe properly, but the word sultry came to mind for some reason. “What’d you do about it?”

Now Izuku really couldn’t breathe because what the hell was Kacchan asking him? He wasn’t sure if he imagined the way Kacchan’s eyes flicked down for just a second before coming back up to rest on Izuku’s face. He gulped a little too loudly and tried to back away without being obvious about it. 

“Noth–nothing.” He stammered. “Why would I do anything? There’s nothing to do when you’re – wound up , you just have to get over it!” The laugh that bubbled past his lips sounded almost hysterical. 

Kacchan’s eyebrow went even further up on his forehead and Izuku couldn’t help but wonder if that was painful for him, what with the giant bruise right over it. But Kacchan didn’t seem to notice it or he just didn’t care, because all he did was take a step closer to Izuku every time Izuku backed up, until he was trapped between the kitchen counter and Kacchan’s unrelenting stare. And then Kacchan did something seriously crazy. 

“So, does that mean you’re still wound up?” He asked and casually pushed his fingers into the waistband of Izuku’s pants. Several things happened at once then – Izuku blew a few so hard he thought for sure there was smoke coming out of his hand; he panicked and tried to scramble away, which resulted in another bruise added to his already colorful collection when he hit his arm on the counter; and he grew a boner so quickly he was positive it had to be some kind of world record. Through all that, Kacchan never let go of Izuku’s pants, he didn’t blink or avert his gaze from Izuku, and somehow, he seemed completely unphased by what was happening. 

“I’m fi–” Izuku’s voice got so high in pitch that he cringed at it, but he couldn’t blame himself for trailing off when Kacchan was playing with the string on his sweatpants like that wasn’t completely inappropriate. And also insane. Izuku cleared his throat, feeling awkward and far too exposed despite being fully dressed. Why was Kacchan being so handsy all of a sudden? Wasn’t he mad at Izuku for their fight? And for… The other stuff? “Um, what are you doing?” 

Kacchan looked up at him and shrugged. “You helped me out yesterday.” He said. “Thought I should return the favor.”

And then, like it was the most normal thing in the entire world, like they weren’t stuck in some weird limbo between not being able to stand each other and being friends, like they weren’t in a public and shared space where anyone could walk in on them any minute – Kacchan dropped to his knees and pulled Izuku’s pants down with him. Izuku never regretted his choice of ditching underwear before bed so badly before, because now Kacchan was staring right at his dick and the evidence of his embarrassment was right there for him to see and judge and Izuku wanted to die . 

Except Kacchan wasn’t throwing insults at Izuku or calling him a disgusting freak for getting hard just because they were near each other. He wasn’t even commenting on what Izuku’s dick looked like. He simply opened his mouth, like he’s done this a thousand times before and knew exactly and what and how to do it, and took half of Izuku’s dick in his mouth at once. Izuku’s knees buckled and he had to physically bite into his hand to stop himself from crying out. He fell back against the counter, probably earning himself another bruise for it, and stared down at Kacchan in utter and complete disbelief. 

Or maybe it was admiration. 

Because Kacchan was taking him down like he was gunning for the “best blowjob” award. Izuku was pretty sure he wouldn’t last long enough to ask Kacchan what the hell he was doing, or why he was suddenly wrapping his lips and tongue and hand around Izuku’s erection like he wanted to suck his soul out of him through the tip of his dick. Izuku didn’t have the words or the brain power for any of that, not when Kacchan’s wet, soft tongue was slipping over the bulging vein on his dick, not when he was forcing his mouth open further and forcing his head down more and oh , Izuku was seeing stars already and he was sure it hasn’t even been ten seconds since Kacchan dropped down in front of him. 

In a different situation, he thought he might be able to appreciate the irony of Kacchan kneeling down at his feet like this, when he accused Izuku of looking down on him just a few hours ago. Now Izuku was literally having to look down at him and Kacchan was willingly letting him do it. He even looked up at Izuku as if wanting to see his reaction, and that, more than anything else, was what did Izuku in. The sight of Kacchan on his knees, with his mouth as full of Izuku’s cock as he could get it and looking up at him for approval, was more than Izuku could handle. He came with a loud cry he couldn’t hope to contain, his legs trembling and clenching around Kacchan’s head. He felt a mix of mortification that he came so quickly and that he came in Kacchan’s mouth without warning, and indescribable arousal at the fact that Kacchan was actually swallowing his cum right now. Izuku thought he could have gotten hard all over again, right in Kacchan’s mouth, just from the sight of his throat moving. 

He breathed in and out shakily, still trying to wrap his mind around what the hell just happened as Kacchan slowly moved back until Izuku’s flaccid dick popped out of his mouth. He licked his lips and swallowed one more time, and then reached down for Izuku’s pants and pulled them back over his hips as he stood up. Now he was face to face with Izuku again and Izuku had to physically hold himself up with his hands gripping the counter to keep from crumpling into a horny heap on the floor. 

“We should probably start cleaning up.” Kacchan said, and just like that, he turned and left Izuku to his silent freak out. 

For the rest of the day, Izuku couldn’t even look at Kacchan without his face heating up and his pants suddenly feeling a lot less comfortable. Which was a huge problem, because he couldn’t stop himself from looking at Kacchan every few seconds. They were entirely alone in the dorms with everyone else being in class and all they really had to do was clean the common areas. Izuku thought privately that maybe they should have gotten punished in a way that would keep them busier, but as it was, the entire dorm was clean before lunch time and Izuku was left stumped on how to spend the rest of his detention. The abundant free time also left him with not much else to do but imagine all the ways he and Kacchan could fill the hours, and take mental notes on all the available surfaces and their level of comfort for prolonged periods of time. 

He mentally slapped himself at least a dozen times in the past hour because his brain kept supplying him with inappropriate thoughts of Kacchan on his knees or on his back or just generally with his legs spread for Izuku. He was turning into a sex fiend without ever having had proper sex and it was all Kacchan’s fault! Just as he thought this, he was startled by the object of his dirty fantasies – Kacchan materialized in front of him out of thin air, making Izuku jump back a step in surprise.

“I’m done cleaning.” Kacchan announced, as if it was Izuku’s job to keep track of Kacchan’s chores. 

“Uh… Good job, Kacchan.” Izuku praised lamely, not knowing what else to say. To his surprise, Kacchan’s eyes widened a fraction and then he quickly looked away. 

“Are you done with your stuff or not?” He grumbled into his chin, then lifted his head slightly to look at Izuku. Izuku looked around and shrugged. 

“I guess so.” 

He didn’t get a chance to suggest a way for them to pass the time or even ask why Kacchan was so interested in his chores, before Kacchan was literally jumping on him and pushing him down on the couch. With a lapful of Kacchan and his mouth full of tongue, Izuku could do very little except take what was being given to him. To say that he didn’t expect Kacchan to kiss him like this would be an understatement – Izuku was still trying to figure out what the hell was happening and if he somehow fell into an alternate reality where Kacchan was hot for him, while Kacchan busied himself trying to take Izuku’s pants of.

This got Izuku’s attention enough for him to start panicking. “Wh-what are you doing?” He mumbled the question against Kacchan’s lips, so the words sounded muffled, but the urgency behind them wasn’t lost on Kacchan. He kept kissing Izuku for a moment longer before finally pulling away enough to look down at him. 

“Taking a break from cleaning. What’s it look like?” He deadpanned. Izuku wanted to shout that it looked like Kacchan was trying to rip his dick out of his pants, but he didn’t think that would go over very well. 

“But we’re in the common room!” Izuku exclaimed and tried to pry Kacchan’s hands away from his crotch.

“So? Everyone’s in class, no one’s gonna catch us.” Kacchan insisted and then leaned down to kiss Izuku again. And well, it wasn’t like Izuku could argue against that. Everyone else was in class and they’d be there for at least another hour before lunch, and really, what were the chances of someone coming back early and catching them? Izuku wasn’t entirely sure what they were doing anyway, but he didn’t have too many thoughts to spare thinking about it when Kacchan was determinedly shoving his hand in Izuku’s pants and gripping his cock. 

Izuku moaned pathetically into Kacchan’s mouth and bucked his hips up. His heart was already hammering in his chest and his breath was sticking to his throat, so it came out in soft little hitches every time Kacchan brushed the head of his dick with his hand. Again, Izuku could tell this wouldn’t last too long – he was too wound up and this all seemed too surreal for him to possibly hold out. He wasn’t even sure why he was so horny all of a sudden when Kacchan only sucked him off this morning. Shit. Did that seriously happen? Izuku almost managed to convince himself everything that happened since last night has been a weird wet dream, but now he wasn't so sure anymore.

He noticed belatedly that Kacchan stopped kissing him and was now watching him intently. The way his eyes bore into Izuku’s almost made him feel uncomfortable because he wasn’t used to being stared at like that, especially when he was being jerked off. The novelty of having someone else touch him like this was overshadowed by his embarrassment and insecurity, so to combat this, Izuku reached a hand under Kacchan’s shirt and found one of his pecks. He always thought they looked extremely touchable and now he actually got to feel it for himself. His eyes widened and he gasped when he brushed his finger over Kacchan’s nipple and it made him practically convulse in Izuku’s lap. There was a brief moment where both of them were too shocked to keep moving and then Kacchan recovered and attacked Izuku’s mouth again. 

“Don’t stop.” He gasped. Izuku thought he must be having a stroke because there was no way that was Kacchan talking to him. But he wasn’t stupid enough to disobey so he quickly pushed his other hand under Kacchan’s shirt and squeezed both of his pecks at the same time. The sound of Kacchan moaning went straight to Izuku’s dick and he would have come right then if the pressure of hands didn’t suddenly disappear. 

His orgasm was ripped from him so abruptly that Izuku was left feeling lightheaded over it. He blinked in confusion, trying to figure out what happened and why his pants weren’t filled with cum right now. But when he looked up he saw that Kacchan’s hands were preoccupied with taking his shirt off to give Izuku easier access and all the disappointment he felt a second ago melted away at the sight of Kacchan’s firm chest and hard nipples. 

“Holy shit.” Izuku breathed out, looking up at Kacchan as if asking permission to keep touching him. 

“Don’t stop now, asshole. You still gotta fuck me after this.” Kacchan announced and went back to playing with Izuku’s dick. 

Izuku was momentarily rendered speechless and motionless as his brain tried to process what Kacchan just said. 

“You… You want me to fuck you?” He gaped. 

Kacchan looked at him like he was a moron. “That’s what I just said.” 

“But-but the others! They’ll come back for sure!” Izuku exclaimed, as if that was the biggest issue with this situation. Kacchan didn’t seem bothered at all by the prospect of being caught. He smirked at Izuku like he was challenging him, his eyes mischievous. 

“I guess you’ll just have to hurry up then.” He said. And Izuku noted that there definitely was a challenge in his voice. 

Izuku realized two things in that moment – one, he was now almost certain Kacchan had done this stuff before and he felt like a fish out of water trying to keep up with Kacchan’s superior sexual experience and knowledge, and two, he was jealous. If Kacchan already knew what he was doing so well, it had to mean he’s done it before, which meant someone other than Izuku got to touch him and see him like this and Izuku wanted to kill whoever had the audacity to get to Kacchan before he did. At that moment he didn’t care anymore if they were caught or even if they were expelled for it. He needed to show Kacchan that he could make him feel better than anyone else ever could. 

He grabbed Kacchan’s hips roughly and flipped them over so Kacchan was on his back and Izuku was hovering over him. Kacchan landed with a soft oof and looked up at Izuku wide eyed. But he didn’t waste time trying to explain himself before he kissed Kacchan again, more determined than he was before. He reached down and ripped Kacchan’s pants right off his legs, ignoring the loud sound of ripping fabric and Kacchan’s outraged cry. He needed more access to Kacchan and clothes were just getting in the way at this point. He didn’t care about anything else except showing Kacchan how good he could make him feel. 

“You want me to fuck you?” Izuku asked in a low voice, looking down at Kacchan. He held him almost possessively now, his scarred hands splayed open over Kacchan’s hips as he pulled him closer. “I’ll fuck you so good you won’t remember anything except my name when I’m done.” Kacchan actually whined at his words. It was a small and quiet sound but Izuku didn’t miss it, and he didn’t miss the way Kacchan was lifting his hips as if inviting Izuku to get him completely naked. 

Izuku didn’t waste any more time – he lowered himself until he was facing Kacchan’s crotch and took off his underwear slowly but with little resistance. He took a moment to admire the way Kacchan’s dick curved, how it was slender but long where Izuku’s was thicker and more veiny. The tip was already wet with precum and Izuku barely held himself back from licking it clean, but he had more important things to worry about now. He promised Kacchan he would fuck him, and he planned to make him come on his dick and not another way. So he lowered himself further, spreading Kacchan’s legs and his ass cheeks in one motion, and then he was leaning forward and pressing his tongue against Kacchan’s puckered asshole. 

“Wait!” Kacchan cried out above him. He tried to grab Izuku’s hair and pull him away but Izuku hugged his hips tightly and kept him close to his face as he started eating him out. “I-I don’t think this–” Whatever Kacchan wanted to say died on his tongue when Izuku started licking him more liberally, dragging filthy moans and loud cries from his lips. He never felt anything like this but he was quickly getting addicted to the feeling of Kacchan’s tight muscles squeezing his tongue. Izuku moaned into his skin and opened his mouth further, leaving wet, sloppy kisses all over Kacchan’s rim until it was wet and loose enough for him to wiggle his tongue inside without too much resistance. 

Honestly, Izuku had no idea what he was doing or if he was doing anything right or not. But judging by the way Kacchan’s voice was getting louder and instead of trying to pull away he was now actively fucking himself on Izuku’s tongue, he figured he must be doing something at least half decent. It was unlike anything he experienced before, to have Kacchan’s fingers in his hair, greedily pulling him closer to his most intimate place. 

“Oh my god.” Kacchan moaned above him, his voice sounding shaky and breathless. “Oh my god– Please, just… Oh god, fuck…”

Izuku was spurred on by the mindless encouragement. He wasn’t even sure if Kacchan knew he was talking out loud, but it made little difference to him. All he needed to know was that Kacchan was enjoying himself. And honestly, Izuku could have spent the rest of the day between his legs and he would have been perfectly satisfied. But he knew they didn’t have enough time for that, so he decided to speed up the process by pushing two fingers into Kacchan’s ass alongside his tongue. He knew he was supposed to take it slower, but Kacchan sucked him in like he wanted nothing more than to have Izuku’s fingers inside him and he didn’t complain about the stretch at all. Again Izuku was reminded that Kacchan must not be so new at this, but he refused to let that deter him now. It was at least working in his favor. 

He worked Kacchan open quickly, adding a third finger way too soon after literally spitting into Kacchan’s asshole. But again he got no complaint from him, only encouragement to keep going and give him more. Izuku wasn’t sure if it'd been ten minutes or an hour, but he knew he couldn’t wait anymore. He pulled away from Kacchan now, his neck and jaw and wrist were all sore from the work, and his dick was way too hard to keep holding off much longer. Kacchan wasn’t much better off either. He was flushed and panting hard, his hair tousled probably as bad as Izuku’s was. There was a bit of drool leaking from the corner of his mouth and he looked like he was on the verge of crying, either from pleasure or from frustration. 

Izuku leapt forward and kissed him greedily, sucking Kacchan’s tongue into his mouth as he settled between his legs. “Tell me if it hurts.” He said quietly and Kacchan nodded, a little too eager to convince Izuku he was actually paying attention. But he didn’t care. He was done putting this off. 

He reached his hand down and wrapped it around his dick, spreading his own copious precum over it to make it more slick. Then he pushed forward until the head of his cock was right against Kacchan’s hole, and he kept pushing forward slowly as Kacchan clung to him. They both moaned so loudly Izuku thought someone outside would have for sure heard them, but it was hard to focus on the consequences right now when he was actually inside Kacchan. It was unlike anything he’d ever felt before – tight and hot to the point that he felt overwhelmed and it was obvious Kacchan was feeling the same. His hair was sticking to his forehead with sweat and he was looking up at Izuku with wide, glossy eyes.

“Move.” He gasped and tried to shift his hips but Izuku grabbed them and pinned him to the couch. That earned him a very un-Kacchan-like whine of protest. 

“Stay put.” Izuku said in a low voice. “You’ll hurt yourself.” 

“But–”

“Kacchan.” The warning in Izuku’s voice must have been obvious because Kacchan actually shut up for once. Izuku leaned down and kissed him slowly, still keeping his hips firmly pinned down. “Good. Now don’t move, I’ll make you feel good.”

And then he started to move. It was clumsy for the first few thrust, but Izuku had the advantage of building up a lot of muscles and mobility in his legs over the last few months, so it came almost naturally for him to adjust his movement in his lower body. It didn’t take him long to find a rhythm they both seemed to prefer, if  he had to judge by Kacchan’s encouraging moans and the way he was gripping Izuku’s shoulders like a lifeline. Kacchan looked like he was fighting to keep his eyes open so he could stare at Izuku, but it was a losing battle once Izuku angled his hips up and pushed into him. 

“Ah! Deku!” Kacchan screamed and clutched onto Izuku even harder. He thought it would leave him even more bloody than he was now, but he didn’t care. “Do that again!” Kacchan’s desperate voice was like music to Izuku’s ears, so he didn’t hesitate to listen. He shifted forward so his knees were bent and pulled Kacchan half way into his lap, giving himself enough leverage to thrust upwards again and again. 

Soon he had Kacchan screaming almost uncontrollably and he was forced to balance himself on one hand so he could use the other to clamp Kacchan’s mouth shut. 

“Kacchan, you have to be… quiet.” He gasped harshly. “Someone will hear.” 

Kacchan’s answering moan was muffled by Izuku’s hand, but it was hardly any quieter than before. Izuku pushed his hands up so it was covering the entire lower half of Kacchan’s face, only leaving his nose free so he could breathe. And that was when Kacchan really let himself loose, full on screaming and moaning like some porn star with Izuku’s hand blocking most of the sound. Izuku couldn’t even be mad about it when it was so insanely hot that he was the one making Kacchan like this. He kept fucking him, speeding up and slowing down every once in a while, trying to find the best way to drive Kacchan absolutely crazy. But he knew he couldn’t keep this up forever. His dick was about ready to fall off if he didn’t come soon, and he still had to make Kacchan feel good too. 

Seeing that Kacchan’s cries had quieted to soft whimpers, he loosened his grip on his face and braced himself with both hands behind Kacchan’s head. 

“Deku… Deku.” Kacchan was moaning over and over, desperately clinging to Izuku with both his arms and legs now. He tried to sneak one hand between their legs to touch himself, and maybe in different circumstances Izuku would have let him, but he was still feeling resentful and jealous, so instead he grabbed Kacchan’s wrist and pinned it over his head. Kacchan looked up at him, betrayal clearly written over his face. “What are you–”

“If you wanna get off, you’re gonna have to do better than that.” Izuku said harshly. When Kacchan just looked at him in confusion, he raised his eyebrows. “Say my name.” He demanded. 

Kacchan gaped at him and then his entire face turned bright red and he looked away. Izuku slowed his thrusts then, giving him the opportunity to listen. He trailed one hand over Kacchan’s stomach and down to his erection, ghosting his fingers over it. It made Kacchan shiver and suck in a shaky breath but he was still refusing to look at Izuku or say anything. Slowly, Izuku started moving again and watched as Kacchan’s body was pushed forward from the impact.

“Come on, Kacchan.” He cooed gently. “Don’t you wanna feel good?” He could tell that Kacchan was clenching his teeth, maybe even biting his tongue. He could be so stubborn. Izuku picked up his pace until Kacchan was crying out again and then stopped. “Just ask me nicely and I’ll let you come.”

Kacchan’s lower lip wobbled and he breathed out heavily through his nose. “Please.” He whispered. 

“Please what?” Izuku prompted him, already moving again. He was edging himself by doing this too, but he didn’t care. 

“Please let me come.” Kacchan said breathlessly, flexing his hand to test Izuku’s grip on him. Izuku thought that his wrist would probably bruise from it later. 

“Ask me nicely.” Izuku demanded and then started ramming into Kacchan again in upwards thrust, the tip of his cock brushing against that area that made Kacchan scream uncontrollably. 

“Ah! Please!” Kacchan cried out. Izuku could feel him struggling to free himself from his grip now but he just squeezed his wrist tighter. “Dek– someone’s gonna come.” Kacchan said through gritted teeth. 

“Yeah I bet.” Izuku hummed. “It’s not gonna be you though, unless you ask me for it nicely.” 

Maybe he was losing his shit or he already lost it a while ago, but Izuku realized he didn’t care anymore. He didn’t care about being found or about the consequences of doing this when they were supposed to be cleaning. All he cared about was hearing Kacchan say his name. 

Kacchan was breathing harshly through his nose, staring at Izuku in disbelief and determination. Izuku was sure Kacchan thought he was bluffing, but he must have realized it wasn’t the case because his eyes were now darting to the very large window on the other side of the room, and then to the door. He glared at Izuku for a moment longer before his eyes became desperate and pleading. 

“Fuck, please! Please just let me come so we can get out of here!” He yelled and tried to kick Izuku in the back. Izuku shook his head and pushed his hips forward again, making Kacchan choke on a moan. Then he reached down and squeezed the base of his dick to make sure he wouldn’t come. “Oh my god.” Kacchan cried desperately. He thrashed under Izuku and whined, trying to get some kind of friction. “Pl–please, you… Asshole.” His insult melted into a loud moan as Izuku dragged his cock over his insides again. 

“It’s just one little word, Kacchan.” Izuku said quietly, his voice even and unrelenting. He leaned down and brushed his lips over the side of Kacchan’s neck, the dip under his jaw. “Come on. You can do it. I know you can.” He whispered. “I’ll make you feel really good as a reward if you’re good for me.”

Kacchan’s next breath came out as a broken moan and suddenly he was nodding vigorously, arching his hips up against Izuku. “Please, please, please. Izuku.” He gasped and then choked again when Izuku immediately started fucking him again, unrelenting and without restrain now. “Izu–Izuku… Shit, yes ! Yes, fuck!” 

Izuku loosened his grip on Kacchan’s cock and used his hand to jerk him off. It was clumsy and uncoordinated, but they were both so pent up it didn’t matter. And just as Izuku felt himself careening toward the edge, he found just enough rational thought left to speak up. 

“In or out?” He gasped, looking down at Kacchan desperately. Kacchan’s eyes found his and he shook his head just slightly, then wrapped his legs firmly around Izuku’s waist. It was all the permission he needed to shove forward one more time and stay fully inside Kacchan as he came. Izuku’s dick twitched as he released and then everything was a lot hotter and a lot wetter as he filled Kacchan up with what was, frankly, a ridiculous amount of cum. 

Kacchan was rutting against him desperately and Izuku used what little mobility he had left in his hand to help him over the edge as well. When Kacchan came, it was like Izuku’s dick literally got stuck inside him. His ass got so tight that Izuku couldn’t have pulled out anymore if he wanted to. The pressure made him cry out and he fell forward on top of Kacchan, pushing his hips up and rutting into Kacchan the same way Kacchan did to him. They both kept trembling for what felt like hours after, their limbs shaky and uncoordinated and useless. Izuku breathed out, swallowing thickly, and pushed himself up to look down at Kacchan.

“Shit.” Kacchan said. He was blinking rapidly like he had spots swimming in front of his eyes. “We… We have to get up.” He said in an unsteady voice. “The others will come back soon.”

In his post orgasm haze, the prospect of getting caught and reprimanded didn’t seem nearly as harmless as it had when he was being driven by arousal. Izuku nodded and somehow managed to force his uncooperative legs under him. The feeling of slipping out of someone’s ass when his dick was soft was in no way near as pleasurable as pushing in, but Izuku didn’t comment on it. They needed to clean this mess fast and get their clothes on. 

They stumbled around on unwilling, buckling legs and cleaned themselves up with tissues. Izuku was just thankful none of their cum landed on the couch, but they still flipped the cushions just to be safe. When the common room looked as presentable as it had been before they decided to defile it, Izuku pulled Kacchan into the elevator. They were still both naked, with Kacchan only having pulled his shirt on because his pants were as good as rags now, and Izuku was in the process of pulling on his underwear as the elevator doors opened on his floor. It was the first time Kacchan was in his room and under different circumstances, Izuku probably would have been freaking out. Considering his cum was currently inside Kacchan’s ass, he figured he should probably keep his cool. 

“Didn’t know you had that in you.” Kacchan said. It seemed that now they were safely behind closed doors, he wasn’t so nervous about being seen naked anymore. Izuku decided to toss him a clean pair of sweatpants anyway. 

“I didn’t know either.” He mumbled as he watched Kacchan pull the pants on. “I’m sorry if I overstepped. I don’t know what came over me.”

Kacchan shrugged. “It’s cool. It was fucking hot.” He scoffed. 

Izuku bit his lip guiltily. “Uh, well… Actually, I do know what came over me.” He admitted. Kacchan just looked at him so Izuku decided it was best to admit it. “I was feeling jealous… Because you seemed so much more experienced than I am so I figured you’ve probably done all this before and I… I know it was dumb. But I guess I’m jealous of whoever got to kiss and touch and…Yeah.” He finished awkwardly and cleared his throat. 

Kacchan didn’t say anything for a long moment and then suddenly he was in front of Izuku again and hitting him on the back of his head. “Idiot.” He muttered. Izuku didn’t dare think it, but Kacchan actually sounded affectionate. “I never did that shit before either. I just wasn’t freaked out about it ‘cause it’s you.” He admitted.

Now Izuku was the one blushing like a tomato. Shit. Did Kacchan really trust him that much? Maybe he should have figured it out already, considering he was the only person Kacchan was willing to let see him vulnerable like he was the other day. 

“Oh.” Izuku breathed out quietly. When he looked up Kacchan was standing right in front of him again, an unimpressed look on his face.

“Did you seriously think I’d do shit like that with just anyone?” He asked. 

“Well, no! But I wasn’t sure, I mean you were so good at it! And so forward… You were amazing.” Izuku said in awe. He couldn’t help himself. Kacchan really was so amazing at everything , even things he’s apparently never done before. 

“I guess you weren’t too bad at it, either.” Kacchan said thoughtfully. “For a first try.” He added, sounding smug. He didn’t give Izuku a chance to defend himself before pushing him back on the bed and climbing over him. “Don’t worry though, I’ll help you practice. Then you can really make me feel good, eh, Izu-ku?” He dragged out the syllables of Izuku’s name teasingly and then kissed him breathless. 

Izuku had to admit, out of all the things he thought would happen after they fought and beat the crap out of each other, this definitely wasn’t one of the options. But he’s never been so glad to be wrong before. He just hoped they could keep this development a secret from the rest of their class, at least for a little while. 

But with how loud Kacchan was during sex, he wasn’t betting on it.