Chapter Text
Midoriya Izuku fell in love very easily.
He'd thought the girl he'd just met at the bar, Momo, was the one. She was really kind, even though Izuku had been incredibly awkward and stuttering all over the place. He'd even gotten her number at the end of the night, so clearly, she found him charming!
Izuku didn't subscribe to the whole ‘waiting three days to call’ thing, and dialed her number the next evening.
He was so excited, Momo was so pretty and out of his league. The phone rang once. Twice. Three times. He heard the click of the phone being picked up and words were about to start tumbling out of his mouth about how pretty she is and how he can't wait to go on a real date with her, maybe to a coffee shop or something like a museum which suited her refined elegance and—
"Hey there, baby," the voice said. Deku froze.
It's not Momo. It's a man. A man with a criminally sexy voice that just sent heat through Deku's whole body.
"Cat got your tongue?" The man chuckled and Deku tried really hard to think with his head instead of down there. Who the heck was this guy? Oh no. Was Momo sleeping with him? Was Deku just one guy of many?
"Uh, um...i-is Momo there? I got her number yesterday, and–"
The guy on the other end laughed. The tone dripped heavy with mockery.
"You sound like a fucking nerd. I dunno who this 'Momo' chick is, but she gave you the wrong number."
"O-Oh...who are you, then?"
The man chuckled and his voice dropped, sultry, before he answered again.
"Somebody who can show you a good time."
Deku whimpered, then mentally cursed for letting out such an embarrassing noise to a stranger on the phone.
"Fuck, baby...was that a moan I just heard?"
Deku flushed, so embarrassed he wanted to die.
"N-No!!" He yelled, before hanging up the phone hastily.
Who in the world allowed that guy to have a voice that sounded like pure sin? And why the hell was Deku so wet just thinking about it??
Momo's rejection of him was long forgotten.
Deku's ears were ringing. He felt so hot and so incredibly out of control. He wanted to call back. He'd empty out probably his whole life savings on that voice. That deep, commanding, sexy voice.
Wait, no!! That wasn't what he should be thinking about! He’d just gotten rejected! And indirectly!!
. . .
"Oh my god, the number she gave you went to a phone sex operator??? Oh my god, Deku-kun!" Ochako burst into laughter, banging her hand against the table, her body trembling in pure joy at Izuku's expense.
"Ochako! Not so loud!!" Izuku hissed.
Iida pushed up his glasses.
"That's unfortunate, Midoriya," he said.
Todoroki looked on without speaking, but he nodded in agreement with Iida.
"Ugh, I can't believe things never work out for me," Deku groaned, stretching out over the table.
"That's only because you fall for everyone, Deku-kun!"
"I do not!!" Deku protested.
"You've had crushes on all of us."
"B-But that's because..." he trailed off and let the sentence die, knowing he didn't have a good comeback.
"You could call that guy back," Todoroki suggested, inbetween mouthfuls of soba.
"No way."
"Why not?" he asked, innocently. Sometimes, Izuku hated Todoroki’s inability to have a filter.
There were a million reasons why not and yet Izuku couldn't think of a single one. Not when he remembered that voice. It was sooo nice. Too nice, unfairly nice.
"Maybe you should take a break from dating and just have fun," Ochako advised.
"Yeah, that guy sounds like he's fun," Todoroki deadpanned. Izuku couldn't tell if he was being serious or not.
"Just be careful, Midoriya," Iida warned. "Don't give out any of your personal information!!"
Izuku sighed. He wanted to remind Iida that the guy would literally have his credit card information if he chose to become a customer.
"Why are you guys all speaking as if I'm going to call him?"
Ochako booped his nose.
"Because you are, silly. We know you."
He sighed. It was like they weren't giving him the option. It couldn't hurt that much, could it? Izuku had money to spare for...'fun'.
"Well...at least there's no chance of me getting my heart broken by a phone sex operator."
Izuku's paced in his room. Should he call? He was scared of the voice on the other end. Not because the voice was scary (which, it was...just a little), but because Izuku knew he would very quickly get addicted to it. The guy didn't even have a face, he didn't know anything about him, the voice could belong to a 40 year-old man with kids, he didn't know.
But then, did it really matter?
Izuku swallowed his pride and got undressed, placing lube and some toys at his bedside. Before he could talk himself out of it, he dialed the number again. It rang once. Twice. Three times. Click.
"Hey there, sexy." There was that voice again. Izuku squeezed his thighs together, already hot.
"U-Um, hi...remember me?"
"'Course I do, baby...you cried real good for me last time, didn't you?" he cooed.
So he didn't remember.
"N-No, um...I’m the guy who called because a girl gave me the wrong number."
"Oh," he said, no longer using his sexy voice. "What do you want, nerd? I can listen to you bitch and whine, but I'm still gonna fucking charge you. Phone sex isn't free and I certainly won't be a therapist for free, either."
Izuku almost wanted to laugh. He was so snappy, but it was...charming. He shook his head. He wasn't here for charms.
"N-No, I...um...I couldn't stop thinking about your voice," Izuku admitted.
"Oh yeah?" the voice said, smug. "Did you stroke your pathetic little cock thinking about me last night?"
"No, um...I-I have a pussy."
"Fuck," the voice commented, breathy. "And you touched that sorry cunt of yours to the thought of me?"
Izuku's breath hitched. He wanted to.
"N-No, I...I waited until now. I wanted to...hear your voice."
The voice let out a low moan. "Fuck, baby... I’m gonna give you the best orgasm you've ever had."
“You sure?”
“Well you’re fucking paying me to, so yeah, I’m gonna make damn sure you have a good time.”
“Ah.”
Izuku smiled to himself about Katsuki’s retort, and gave the guy his payment info quickly.
"So what should I call you, baby?"
"My name's Izuku, but my best friend calls me Deku."
"'Deku' like 'useless'?" he snorted. “Some best friend you have.”
"No, like a 'you can do it', kind of feeling."
The man chuckled. "I think I prefer the former. You're not good for anything, Deku," he growled. "Nothing except taking my cock and letting me fill all your pretty little holes."
Izuku whimpered.
"Hah. Needy little bitch, aren't you?"
Izuku was so, so glad he had bluetooth headphones.
"M-Maybe..."
"What are you wearing, baby?"
"...Nothing..."
The voice on the other end dropped. "You really are needy, fuck. You want my hands on you? Tweaking your cute perky nipples."
Izuku did exactly that, closing his eyes and imagining this stranger's hands on him. He figured they must be large, if they matched his voice at all. He let out a quiet whine.
"You're such a fucking slut, Deku...I bet you're dripping just from the sound of my voice."
"A-Ah...I-I might be..."
The voice chuckled darkly. "I already know you are. I want you to rub yourself for me, baby. Imagine me inbetween your thighs, teasing your swollen clit with my tongue...my fingers pressing into you slowly..."
Izuku followed the man’s words, working himself open, imagining the stranger's tongue on him, fingers that aren't his own inside him, and was shocked by how much more pleasurable it was just by having this person on the phone with him.
He lifted his hips and moaned, needing more.
"Fuck, you're so lewd. You want my cock, huh?"
Deku nodded, forgetting they couldn't see him. He answered them, trying his best to reciprocate.
"Y-Yeah. I want your cock in me, I want you to mess me up..."
"Shit, Deku. You a fucking whore or something?"
"N-No...'m a good boy...saving myself for- ah..! somebody special..." he replied, whimpering as he thrusted his fingers in faster, embarrassed and turned on by the wet sounds it was making.
"Yeah? I must be pretty special then, if your little virgin pussy is this wet and eager for me."
Suddenly Izuku's fingers weren't enough. God, he had no clue who this person was, but he wanted them inside him.
"'s not enough...I want you inside me."
"You got something to be 'me', baby?"
Izuku pulled out his fingers, moaning as he did it, and grabbed his dildo.
"Y-Yeah. It's 6 inches I think."
The man laughed. "It's not 'me' but it'll do. Bet you couldn't handle me anyway, nerd."
"Y-Yes I could!"
"If I were really there, you'd be cumming every few minutes, you little slut."
Izuku bit his lip at the thought. He pressed the tip against his entrance. He whined as he pushed it inside him, listening as the man's breath hitched.
"Mm, fuck, you're so tight. Made to take my cock, Deku."
Deku moaned and whimpered, pushing the toy in and out of him quickly, imagining the man would be relentless.
"Ah...hah...so big...!"
"That's fucking right, nerd. Take it, baby."
Izuku pushed his hips back against his toy, whimpering and unable to hold back his moans. It felt so much better than usual, imagining this stranger's cock inside him.
"Fuck, your moans are hot. Think you can handle more?"
"Ah...hn...y-yeah. What should I do?"
"I want you to stick a finger in your ass for me, baby. Let me fill all your holes."
Deku switched positions, lying on his back so he could reach around himself easier. He stopped for a little to spread lube on his fingers, before spreading himself open and sticking his toy in again.
"You ready, slut? C'mon, finger your ass and moan pretty for me."
He did as the man told him, feeling incredibly full. The position required more flexibility than he thought he had, but he figured it was worth it. It felt too damn good to not be worth it.
"Mn...I-I can't… I'm close...Ah..!"
Izuku thrusted his toy harder and fingered himself with more force, taking more than he ever had on his own before as he listened to the sexy moans of this stranger. The man on the other end did this for work so his sounds were probably fake, but they were still hot nonetheless and brought Izuku closer to his orgasm.
"Hah...are you gonna cum, you little bitch? While you're crying for my cock, Deku?"
Deku moaned, desperately, chasing his high.
"I'm gonna cum...fuck, you're gonna make me cum..!" he wailed.
"Cum for me, Deku."
Deku cried out, pulling out his toy and fingers, rubbing his swollen clit as he squirted, making a mess of his sheets.
"Damn," the man said, tone smug as hell. It made Izuku upset but he couldn't say anything as he tried to catch his breath. "You're such a crybaby."
"Sh-shut up."
"K. I will then. Bye—"
"Wait!" Izuku interrupted, not really sure why.
"What? Spit it out, nerd." He sounded impatient.
"Um...what's your name?"
"Katsuki."
"Then, um...thank you, Kacchan."
A pause.
"Did you just thank me for making you cum?"
Izuku fumbled. "U-Um, yes??"
Katsuki laughed. "Fuckin' virgin. Make sure you clean yourself up and shit. And, for reference...do you have limits or fetishes for me to jot down in my clientele book?" He'd really switched to normal so easily.
"I have limits on blood and uh, toilet stuff. I guess I like being submissive and letting others take control. And uh...I like punishments and rewards," he said.
"Any reason why punishments came before rewards, nerd?"
Izuku heard the cockiness in his voice and the clicking of a pen.
"N-No. Coincidence."
Katsuki gave him a sarcastic "uh huh" in response.
"Um, b-bye, Kacchan."
"Bye, idiot."
Click.
Great. Now Izuku had to change his soaked sheets.
"Damn, Deku-kun. Was it that good? You've been zoning out all day."
"Uh, maybe," he admitted. He just wanted to be done with classes for the day. And he wanted to get back at Katsuki for making fun of his lack of experience. He was inexperienced, sure, but he wasn't vanilla.
And it bothered him that he was so nonchalant about what they were doing. Of course, that was to be expected, but...he wanted to hear how that voice really sounded. He wanted to hear that guy fucking into his hand or a toy and saying his name. Or, well, his nickname. Izuku felt embarrassed that he was putty in this guy's hands...(with his voice??) but Katsuki was completely unbothered.
He had a strange urge to one-up him. He was determined to beat him at his own game. It would be the little pick-me-up Deku needed, after getting dumped by the love of his life for....y'know, the umpteenth time.
It wasn't like anything bad would happen. Katsuki was just a voice.
//
Izuku was determined. So he’d decided to be a little riskier with his calls, calling him Daddy, starting off with him already using a vibrator, hoping to catch Katsuki off guard and get him into the mood, instead of him just being ready to work. Katsuki always remained professional about it, and Izuku was losing his patience.
If being risky over the phone wasn’t working, then perhaps doing something risky in real life would.
"Kacchan," Izuku moaned into the phone, as soon as the call was picked up. "A-Are you busy?"
"If I say I'm busy, will you hang up?"
Izuku huffed, pouty.
“No...and you don't want me to hang up, Kacchan."
Katsuki sighed, but put on his "customer voice" anyway.
"Yeah? And why's that, baby?"
Izuku giggled.
"Because I'm in public, Daddy."
Katsuki went silent. Izuku stopped touching himself, worried.
"Kacchan...?"
"Jesus fuck, Deku, how much of a slut are you? Couldn't even fucking wait till you got home to beg for my cock."
Deku whimpered.
"Where are you?" he demanded to know.
"B-bathroom stall. At the gym."
"Do you know how easily you could get caught there?"
Izuku chuckled.
"Why do you think I'm here?" came his cheeky response. "Kacchan, if you caught me like this...fingering myself in public, what would you do?"
Katsuki sucked in a breath.
"'What would I do'? I think the better question is 'what wouldn't I do', after seeing a cute little boy like you getting himself off in front of me."
Izuku thrusted his fingers in harder, trying to keep his moans quiet.
"Would you...ah~ would you force yourself on me, Kacchan?"
Oh, Katsuki thought, he really meant it when he said he didn't have that many limits.
God, this stupid boy was fucking... ruining Katsuki's work routine. Usually he was able to study or complete assignments without batting an eye, but... Deku was justー fuck. He got hard hearing those stupid, slutty, desperate moans and whines and that absolutely abominable nickname. It was hard to be professional. It wasn't like he hadn't jerked off with customers before, but it was casual and he was never that into it.
Something about the nerd's voice just made him absolutely feral with lust.
Deku would always talk to him about mundane shit after orgasming during their calls lately, and it was cute and Katsuki didn't mind his friendliness at all— but he'd be sitting there, rock hard, waiting for the guy to fuckin hang up so he could masturbate with him in mind.
Not that he knew what to picture, since they'd never asked. But that cute, subby voice was enough. God, it made him so horny it was frustrating if he thought about it in class.
And now he was suggesting this. The kind of kink Katsuki had and rarely got to indulge in because well. Most people found it horrific. But Deku... fuck, was Deku made for him or something? Why did his kinks so perfectly suit Katsuki's own?! Fucking shitty nerd!!! He needed to be working out!
"K-Kacchan, I'm sorry! I should've asked before..."
"Shut the fuck up, Deku," Katsuki barked.
"Is that really what you want, baby? To be forced?"
Deku moaned. Katsuki’s pants were way too fucking tight.
"Deku. I need your consent. And a safeword. And a general idea of what you want."
The blonde was almost ashamed about the way he was rushing through his words.
"Yes, Kacchan, please. I want you to rape me. 'Red' for the safeword and...I want you to be... mean."
Fuck, Katsuki felt like he was gonna burst out his fucking pants.
"Now that's a good slut. You've just been waiting for someone to walk in on you, huh? Got your cunt already spread open for me. Desperate for someone to sink their cock into you."
Deku moaned and pushed his fingers in deeper.
"You're so wet, I know I could slip into that tight little pussy with ease. But what's the fun in having a toy if you don't use it? Your moans are too loud, you stupid whore. I think I should stuff your mouth."
Katsuki closed his eyes and started palming himself through his clothes.
"N-No, please!"
Katsuki's breathing was ragged now, Deku's little protest was so weak, so obviously for show and fuck did Katsuki want to indulge.
"'No'? That's the most pathetic 'no' I've ever fucking heard, you slut. I don't think you mean it. Even though I've threatened you, you're still fingering that sloppy little pussy."
Deku whimpered, loud enough that anyone in close proximity could hear him. God what if he was in the locker room and not just a bathroom? Letting everyone listen to him like this.
"Th-that's not..."
Katsuki finished the sentence for him.
"What, it's not true? Lying isn't good, baby. You need to fix your mouth. You're fucking gagging for my cock at this point, so why don't I be nice and shove it down your throat?"
"Kacchan, please don'tー"
"I don't know what the fuck made you so entitled that you think you're making the decisions here," the blonde growled, angrily, "but you're gravely mistaken. You're gonna take my cock and I'm going to fucking use you until I'm satisfied, bitch."
Katsuki unzipped his pants and pulled his boxers down, no longer able to be professional about stupid, slutty virgin Deku and how fucking willing and submissive he was.
"So you can open up, or I'll force you open."
Katsuki heard Deku say "Ah", briefly, before some rustling and the sound of Deku gagging.
"Fuck," Katsuki groaned, breaking character. "Did you just fucking shove your fingers into your mouth?" Without me even telling you? he thought.
Deku made some sort of garbled noise that Katsuki assumed was a yes and obscene, wet sounds.
"Such a fucking whore, aren't you? I knew this was what you wanted. It's nice to have that craving fulfilled, huh?"
Deku whined and started thrusting his fingers harder, crying about it like it was so difficult, so terrible, and Katsuki was leaking copious amounts of precum as he rocked his hips up into his hand in time with Deku's noises.
"Damn fucking- nerd," he hissed. "Bringing this shit out of me, forcing me to be unprofessional. Take your fingers out."
Deku did as he was told, and Katsuki stopped touching himself.
"I'm going to fuck you now, and you're going to shut your mouth. Don't make a single fucking noise, or I'm only going to be rougher with you. Every time you slip up, you're going to push your fingers deeper and fuck yourself faster. And if you scream, well...I guess everyone will know how much you love being raped by my cock."
Izuku was dripping down his legs and currently cursing the fact that Katsuki was only a voice and not a person in his life becauseー god, did he want sex like this. To be used, beaten, chokedー he craved it, and the fact that he'd finally gotten Katsuki to reciprocate just made it better for him.
"Got that, Deku?"