Archive of Our Own ^beta

Katsuki's arm rehabilitation didn't bother him much, he was honestly just glad he was able to do it in the first place. He still couldn't believe the doctors had seriously wanted him to consider a prosthetic, like what the fuck? His quirk comes from his palms- meaning he needs them to be a hero.

And if anyone knows Katsuki Bakugo, they know his entire goal in life is to become the number one hero in Japan.

So yeah, once his heart was stable from a few weeks of rest, physical therapy became his new best friend. The Bakusquad and the rest of their classmates encouraged him along the way, helping him grow accustomed to using his left hand for things and cheering him on during the agonizing exercises to strengthen his right.

Kirishima had been especially consistent with aiding Katsuki since his injury, insisting on carrying the blonde's school bag, tying his tie, and writing extra notes for Katsuki until he was able to make out his own writing from his left hand.

Katsuki hated it at first, but ended up growing closer to his red haired friend in the process, and even started enjoying the extra attention and care that came with relying on him.

Even after getting most the function in his arm back, Kirishima still offered to do things for Katsuki that made his heart flutter stupidly in his chest.

Despite that, he always turned him down, because he didn't need help with anything anymore.

That was, until one of his friends decided to bring up the most stupid, embarrassing thing he'd ever heard.

"So, your arm seems almost back to normal now huh, Kacchan~?" Kaminari asked as he, Katsuki, Sero, and Kirishima were lounging in Kaminari's room playing video games.

"Yeah, still sucks when I overdo it." Katsuki said, glancing down at his controller and feeling the soreness building in his wrist already, "But I can handle basic shit now."

"I bet you're relieved, I can't imagine not being able to use my dominant hand." Sero said with a sympathetic smile, "I mean seriously, it's like you had to relearn everything to be able to function."

"Yeah man, you're ambidextrous now!" Kirishima chimed with a laugh, "That's pretty impressive!"

"Impressive, but I bet it still sucked. How was it having to use your left hand to jack off?" Kaminari asked, making Sero snicker.

Katsuki sneered at them and took out Kaminari's player in the game, "Don't know, didn't do that shit."

"What?" Sero asked, suddenly seeming to take the subject seriously, "It's been like, over a year man! How did you, ya know, take care of business if not with your left hand?" He laughed outright then and added, "Or was that part of how you strengthened your right hand again?"

"The hell do you mean, soy sauce face??" Katsuki huffed, "I'm not addicted to stupid shit like that, I didn't need to 'take care of business.'"

"Okay, I know you're the high and mighty Bakugo Katsuki, but every guy needs to rub one out here and there." Kaminari said, raising a brow at him before directing his attention back to the game, "Ya don't gotta lie, dude."

"I'm not lying, idiot." Katsuki deadpanned, "Not everyone has a chronic porn addiction like you and grape for brains."

"Even so, he's got a point, Bakugo." Sero said with a wary smile, "Isn't it like, unhealthy to stay pent up like that? I mean, you had to do it a couple of times, right?"

"Yeah, surely you didn't go around giving yourself blue balls all the time." Kaminari added.

Katsuki gritted his teeth and looked at Kirishima, "Will you tell these dumbasses you don't gotta jerk your shit 24/7?"

"Ah.." Kirishima laughed awkwardly, face completely red, "I mean, I gotta be honest, man.. I think you are supposed to do it every now and then, right? I've never really gone longer than a week without it."

"See? We can admit it, so you can too." Kaminari pressed with another look in Katsuki's direction, "Or is it you've got a.. little problem with your little Bakugo down there?"

Sero and Kaminari busted out laughing as Katsuki gritted his teeth and made explosions with both hands, "You wanna run that by me again, dunce face?? I'll kick your ass!! I don't have a fucking problem with that!!"

"Hey, Bakugo, it's okay man." Sero teased as he stifled another laugh, "If you can't get it up, they make pills for that."

"We could take you to the doctor now if you want." Kaminari added with another fit of laughter.

"You guys are all just stupid!! It's perfectly normal to not do that shit!!" Katsuki barked as he stood and threw the controller down, stomping to the door, "Fucking idiots!!"

"Whoah, hey where are you-" Kirishima started before Katsuki slammed the door shut behind him.

~

Katsuki couldn't believe his stupid friends. Once he made it back to his room, he shut and locked the door and gritted his teeth, looking down at himself. Surely it was normal not to touch yourself, right? He wasn't the only one like this!! He didn't have a fucking problem!!

Embarrassment flushed his features as he groaned to himself, wishing he'd just lied and made something up to go along with their stupid rambling.

Of course he'd wanted to jerk off before, but doing that with his hands? Hands that produce explosive sweat? And ignite from his fucking palms? Yeah, fuck that. He doesn't really like the idea of holding literal TNT next to his dick, even if he has great control over his quirk. One slip up would mean the most awkward visit to Recovery Girl ever, and he could gladly forfeit a chance of momentary pleasure to avoid that shit.

But.. they'd said it was, unhealthy?

Surely it was fine, right?

Feeling curious and overwhelmed, Katsuki laid down on his bed and whipped out his phone, going to his private browser to search.

'Do you have to masturbate?'

'No, masturbation isn't necessary for survival, but it's a normal, common, and healthy sexual activity that offers benefits like stress relief, better sleep, improved mood, and self-discovery, with no inherent health risks unless it becomes compulsive and interferes with daily life. The body naturally manages sexual tension, but masturbation provides pleasure and psychological benefits, with experts noting it's a safe way to explore your body and desires.'

Safe way huh?

Katsuki huffed and rolled his eyes, backing out of the search. Whatever, he didn't need that shit.

~

Katsuki couldn't get it out of his head.

It'd been two days since that stupid conversation, and thankfully the guys had refrained from bringing it up again, likely due to the explosive blonde storming out before. They liked to push his buttons, but also knew when to take a step back if it was something that actually upset the feisty hero.

But the seed was already planted, and Katsuki was going absolutely crazy in his mind about it. He'd even looked into it more, and read all kinds of things about how ejaculating often is good for reducing risk of prostate cancer and even boosts heart health. Along with the obvious benefit- the pleasure that comes from it.

Katsuki wasn't scared of many things in life, but even with this new found desire to try this out, he was still terrified of something going wrong. But how could he masturbate without his hands?

He'd tried rutting against a pillow once, and despite being alone, felt too embarrassed and stopped immediately. He wasn't a fucking dog, he didn't want to hump shit to get himself off..!

Next, he found himself glancing around online at toys. He even found a fleshlight made for people with heat related quirks that needed the extra.. help. As perfect as that was, living in the dorms meant sharing a mail room, and he'd be damned if he risked someone sneaking a peek in a package with his name on it to find a fucking sex toy inside. And knowing his friends, that's what would happen.

And it's not like he could just waltz into a sex shop and buy something in person, not when nearly all of Japan recognized him for his feats during the war. 

So how the hell was he supposed to do this??

If only he had Yaoyorozu's quirk and could make himself something to use.

Katsuki rolled his eyes at that thought, because he loved his own quirk. His explosions gave him the ability to be who he wanted to be, save people he cared about, defeat strong villains, surpass even his seniors in raw power and prowess.

Yet, that very quirk had him completely stumped now.

"Ah man, it's no use!" Kirishima groaned from across from him, sitting criss cross on his bed and staring down at his notes like they offended him, "I don't know how to go about this problem at all! Can't you just show me how you do it?"

Katsuki's face burned as his words settled over him, "No, Shitty Hair. I explained the concept before, you have everything you need to do it on your own. Figure it out."

"But it'd be so much easier if you'd just do it for me, man..!" Kirishima reasoned, "Then I could see how you did it and it'd make sense!"

Katsuki worried with his bottom lip, keeping his eyes trained on the assignment before them, "Not every problem can be solved by having someone do it for you."

Kirishima sighed and nodded, "I know, but it'd be a lot easier to have the help until I could do it on my own, ya know."

Katsuki wasn't going to make it. Why was he comparing this in his mind right now?? As if he could ask someone to-

"You okay, man?" Kirishima's voice interrupted his inner turmoil, "You've seemed extra uh.. on edge, since the other day."

Katsuki felt his face heating as he grabbed his pen, twirling it in his hand to have something to do, "I'm fine, I dunno what the hell you're on about. Focus on your problem."

"Listen, I'm sorry if what they were saying crossed a line the other day. You know they were just messing around with you, right?"

Katsuki froze up, giving his red haired friend a quick glare, "Why don't you worry about your own shit? I said I'm fine."

Kirishima gave him a look that told him he could see straight through his defensive behavior, then stated as much as he sighed, "Dude, come on. It's just us right now, you can tell me if it bothered you."

Katsuki groaned in defeat and tossed his pen down, hiding his face in his hands, "It's just so goddamned frustrating. Why the hell would they bring up something like that? That's way too fucking personal."

Kirishima smiled awkwardly and grabbed the pen, balancing it on his finger, "Yeah, I know. Like you said though, that kinda thing seems to always be on Kaminari's brain."

"What brain?" Katsuki huffed, smirking despite his mood as he lowered his hands.

Kirishima laughed and nodded, "Exactly, so just don't worry about it, man. Shouldn't let what they say get to you."

Katsuki glanced over and stared at the pen in Kirishima's hand, watching it wobble, "Well.. it bothered me cuz I can't do it."

Kirishima furrowed his brows and met his gaze, "Can't do what?"

Katsuki gulped and looked away, hugging his knees up to his chest, "My hands. Explosive sweat. Not really the safest thing to put near your crotch."

Kirishima gaped at him for a moment and leaned in closer, "So wait, you mean you've never-"

"Never."

He blinked in surprise and sat the pen down, "Then how do you do it..?"

Katsuki lowered his head a bit, still avoiding his gaze, "Just don't."

"Wha- Have you even cum before..?" Kirishima asked, shock still clear in his voice.

Katsuki's cheeks and tips of his ears were burning as he peeked over at him, "Nope."

"Holy shit, man." Kirishima said as he sat back, "You never even tried to like, get off on just pressure..? Through your clothes or whatever?"

Katsuki shook his head, fidgeting his feet together, "I mean, I sorta tried, then chicken out.. Makes me feel stupid.."

"Dude, it's not stupid," Kirishima said with a small blush before swallowing, "Um, seriously, it's normal. I think you should ya know.. keep trying."

Katsuki grimaced and peeked over at him again, "I can't, okay..? I get too in my head and it kills my boner before it even feels good.."

Kirishima glanced down at the assignment and looked like his mind was reeling. Katsuki almost thought they were just dropping the subject to focus on the work again, but just as he'd calmed down from his humiliating confession, Kirishima asked the second most embarrassing thing he'd ever heard in his life.

"Well, uh.. Would you want me to help you?"

Katsuki raised a brow at him, completely caught off guard, "What do you mean..? How could you possibly help with this?"

"I mean, if you were okay with it.. I guess I'd just ya know," Kirishima stammered, rubbing the back of his neck nervously, "Give you a hand."

Katsuki gaped at him for a moment, feeling like the world went still around him. Had he heard him right? No, there's no way that's what he meant.. Right?

"By 'give me a hand'.." Katsuki deadpanned, "Are you saying you wanna jerk me off?"

"Just to help you out..!" Kirishima assured with a panicky laugh, holding his hands up defensively, "I mean, it just seems like something you should get to experience! And you're my best friend, what kinda man would I be to not offer help with something like that?"

Katsuki blinked dumbly at him for a moment then cleared his throat, "You're serious? You'd.. do that."

Kirishima lowered his hands and glanced away, "Well.. y-yeah. Sorry if it-"

"Okay."

Kirishima's eyes shot up to meet his, "Wha-? Okay?"

"Yeah." Katsuki said quietly, grabbing his assignment and pen, "I'll do this for you." He peeked over at him, his pale skin dusted the most beautiful pink Kirishima had ever seen, "Then you can.. do that for me."

Kirishima nodded and blinked back his shock, "Ah, yeah..! Okay, cool! Sounds good!"

Katsuki swallowed his nerves and got to work, finishing up quickly before showing Kirishima how the question was supposed to be answered. He explained everything thoroughly and the red head was relieved to finally make sense of things, but then became a flustered mess as soon as Katsuki closed their books and set them aside.

"So.." Kirishima started, shifting uncomfortably in front of him, "What gets you hard? Got something you like to watch?"

Katsuki shook his head and fidgeted with his hands, "Not really, I don't watch that shit."

"Oh." Kirishima said lamely, "Um-"

"I don't need it." Katsuki admitted as he inched closer, looking the other way and speaking quietly, "Y-You can just, ya know. M'ready."

Kirishima couldn't help but to notice Katsuki's flushed complexion before glancing down at his sweatpants, an obvious bulge making an appearance.

"Right, okay." Kirishima said as he took a steadying breath, feeling his own cock twitch in his pants, "Here, why don't you turn around so I can reach around you, make it feel more natural."

Katsuki stayed quiet and nodded his head, maneuvering over between Kirishima's legs with his back to his chest. He was already turned on by the idea that this was even happening, but the close contact with his friend had his entire body buzzing with anticipation. He'd felt turned on before, sure. But this was way more extreme than anything he'd felt before, and his heart was pounding so loud he thought he could hear it ringing in his ears.

"Yeah, that's good." Kirishima said, his breath against Katsuki's ear as he leaned closer, causing the blonde to visibly shudder, "Um, sorry, you okay?"

"Course I am.." Katsuki huffed softly, no bite to his tone as he stiffened up against him.

"Okay, can you uh, lower your pants for me?"

Katsuki gulped and fidgeted with the seam of his sweatpants before slipping them down along with his underwear. He closed his eyes in embarrassment as his erection was freed from his clothes, the air cold against the leaking tip.

Kirishima brought his chin down to his shoulder as he looked over him, tentatively reaching his hands around Katsuki's waist, "Okay, gonna start now.. uh, you just tell me what feels good, okay? Or if you're uncomfortable at all."

Katsuki nodded and felt his breath hitch when Kirishima's hand wrapped around his cock, his other holding still against his side. He couldn't believe this was happening- His friend was really fucking doing this. Kirishima. Was doing this.

He was touching his cock.

And holy fuck- Katsuki opened his eyes and let a soft, surprised gasp slip from his lips as Kirishima circled his thumb against his tip, smearing the milky white fluid along his skin, "Ah, Eijiro..!"

He tensed again as he felt Kirishima groan against him, his chest reverberating against his back, "Shit, Kats.. You must be really sensitive from not being able to touch yourself, huh?"

Embarrassment stung Katsuki from his words, but he was so lost in the new sensations he just nodded his head and gripped onto the bedsheets, trying desperately to not buck his hips towards the intense feeling.

Kirishima slipped his hand up, coating his palm a bit with his pre cum before rubbing it back down his shaft and gripping it more firmly.

And that's when Katsuki really lost it- panting like a dog in heat as his friend's hand started pumping his cock in slow, deliberate strokes, eliciting so much pressure in his gut he thought he was going to explode. His heart was beating erratically, almost enough to scare him as he watched Kirishima's hand forcing more liquid to bead at the tip of his cock.

He couldn't take it, he started squirming and shaking his head, pressing his feet down into the mattress as if he could somehow ground himself from the overwhelming sensation building and building inside of him, "Ah- Ei..! It feels weird..!"

"Good weird, or bad weird..?" Kirishima asked, his voice low and husky as he stayed on task, drawing pleasured huffs and gasps from Katsuki with each pass of his hand.

"Hmn, I- I dunno..! Good..? S'good!" Katsuki whined, finally losing control and rolling his hips forwards a bit, "Fuck..! Really good!"

"Yeah?" Kirishima asked, his own breath coming out ragged against Katsuki's ear, "You like that, Kats..? Want me to go faster, tighter?"

"Ah, y-yes? Please! I dunno..! Ei..!!" Katsuki pleaded, bringing his hands up to Kirishima's arms and clinging to him tightly, "Jus' don't stop..!"

"Fuck, Katsuki.." Kirishima practically growled, sending another new wave of unprecedented desire through Katsuki's body.

Suddenly that pressure building up toppled over into something Katsuki had never felt before, drawing his muscles taut as he crashed over the edge. His mouth hung open in a silent cry as his pleasure was coaxed out of him in waves, spurting all over his friend's hand.

He trembled as he held onto Kirishima's arms for purchase, riding out his orgasm and panting for breath.

"You came lots, Kats." Kirishima said low as he stilled his hand, "Feel good?"

Katsuki swallowed, his mouth dry as he nodded, "Yeah.."

"Um.. If you uh, ever want me to do this again, I don't mind.." Kirishima said as he slid his hand off his softening cock and leaned over to grab some tissue.

Katsuki huffed a laugh and leaned back against him, "Eijiro?"

"Yeah?" Kirishima asked, cleaning off his hand.

"Do you like me?"

"Well.. I did just jerk you off."

Katsuki smiled and turned to look him in the eye, "Why the fuck didn't you just ask me out like a normal person?"

Kirishima opened his mouth to speak, but Katsuki stopped him dead in his tracks with a kiss.