Archive of Our Own

Chapter Text

Katsuki’s wide-eyed, staring unseeingly up at the ceiling, his mouth dropped open as he draws in gasping breaths. His shorts are gone and Deku’s head is between his legs, a place Katsuki never thought he’d be. But there he is, making ungodly slurping sounds as he tries to fucking destroy Katsuki or some shit, and it’s becoming clearer by the second that it’s actually fucking working.

He's only in this disaster of a situation because Kaminari doesn’t know how to keep his goddamn mouth shut.

“Can any of you guys get off without touching your dick?” he asks one night out of the blue while there’s a group of them gathered in the common room. They’re supposed to be studying and shit, but the question immediately has everyone jolting, startled noises echoing around the room.

Kirishima goes rigid where he’s sitting on one of the other couches, while Sero lets out a long, drawn out, “Uhhhh…”

“Wow,” Ojiro mutters, hunching further over his notebook. Katsuki catches Tokoyami, having just taken one single step into the room, do an abrupt about-face so he can book it back to the elevator before anyone else notices him.

Coward, Katsuki thinks, jealous of the guy for the first time in the entire two years he’s known him. He can’t help taking a furtive glance toward the kitchen and then over to the dining room tables, trying to make sure there aren’t, like, any girls around for whatever this train wreck of a conversation is going to be. He doesn’t think Kaminari would’ve thrown that shit out there if there was, but still.

Actually, he doesn’t know why he even fucking cares. It’s not like he’s the sort to get embarrassed – it’s just fucking awkward, okay? He usually does his fucking damnedest to avoid getting caught up in bullshit like this, but he’s settled into a corner of one of the couches, textbook propped open against his knees, and fucking Kaminari probably KNOWS he’s not getting up to leave anytime soon.

Deku’s on the ground not too far from him, his own papers spread across the coffee table. Aside from darting a quick look Kaminari’s way, he doesn’t say anything.

“Well??” Kaminari demands after the silence stretches on for an extended moment. “Come on, don’t tell me none of you have even tried.”

“Dude,” Kirishima says weakly, his face nearly as red as his hair. “What the hell?”

“Are you talking, like, humping shit?” Sero tries, because apparently he’s the only one insane enough to indulge Kaminari’s batshit whims.

Kaminari shakes his head. “Nah, that still counts as touching.”

Katsuki’s brows draw down and he glares at his textbook, trying to put extra effort into focusing on the words that are starting to blur in front of him. He’s not thinking about whatever Kaminari’s alluding to, he’s not. He’s not going to waste time trying to figure it out.

Sero hums. “So then you mean…” Katsuki lifts his eyes, barely, just in time to see him making some kind of crude gesture with his hands, and Kaminari laughs.

“You can just say it, man. Yeah, I’m talking about ass stuff.”

“But just…ass stuff,” Todoroki repeats, and Katsuki really regrets that they’re sitting on the same couch. He really regrets that they’re in the same fucking room at all because those are definitely some fucking words he never wanted to hear come out of Icy Hot’s mouth. Ever.

“Yep,” Kaminari says, popping the ‘P’, and Sero immediately scoffs.

“That’s a fucking myth,” he says. “There’s no way.”

Kaminari’s eyes light up a bit. “You’ve tried?”

“Sure,” Sero says, with a shrug so casual it’s actually infuriating. “It’s fine and all, but I have to rub one out at the same time.”

“Damn, that sucks.” Kaminari gives him some kind of commiserating look. If Katsuki was on the other end of that look, he’d probably blow the guy’s face off. But Sero just narrows his eyes.

“You’re saying you can do it?”

“Well, yeah,” Kaminari says with another laugh.

Todoroki tips his head. “You can have an orgasm without touching yourself,” he clarifies, voice oddly flat and not a little disbelieving.

“I usually need help.” Kaminari shrugs. “But yeah, pretty much.”

“Bullshit,” Sero says quickly.

“I’m serious!”

“It’s possible,” Sparkle Fuck says loftily from where he’s draped sideways across another armchair at the far end of the room. Katsuki had completely fucking forgotten he was there and he’s not all that happy with the reminder that he exists.

Kaminari throws a wide grin his way. “You, too, Aoyama?”

“Mm,” the other boys confirms, not even bothering to lift his eyes from the book he’s reading. “It’s very, very possible, Sero. Believe me.”

“I’ve never tried,” Todoroki speaks up again, and Katsuki’s seriously about to kick him onto the fucking floor.

“They’re lying,” Sero says, looking stubborn. “That, or I’m doing something really wrong.”

“Oh my god,” Kirishima groans, dragging his hands over his face, and Ojiro clearly shares his sentiments because he’s suddenly tipping backwards onto the couch cushions so that he can drop his notebook on his face.

“You guys are so repressed,” Kaminari says in awe. “Experiment a little, goddamn.”

“I’m literally telling you that I have,” Sero complains. “And I’ve never had an ass-only orgasm.”

“It’s probably easier with a partner, mon ami,” Aoyama says, finally glancing over at him. “Or equally likely that you’re just unable to.”

“Or it’s equally likely that it’s bullshit!”

“It’s not,” Deku says softly, talking for the first time since Kaminari brought this hell down upon them all. The tips of his ears are red and he’s chewing on the end of his pencil like the goddamn nerd he is, gaze steadfastly pinned on his homework.

Katsuki has never thought about Deku and sex in the same sentence before in his entire fucking life, probably, and the fact that it’s being forced on him now is absolutely unacceptable. He doesn’t want to know why Deku knows that. He actually can’t fathom a world where Deku does, like, sex shit. Even though it’s totally normal, he knows that. Katsuki never gets too caught up in it himself, he only bothers getting himself off every so often, but he knows that he’s probably the outlier there.

Regardless, despite wanting to disappear into the couch cushions, and also despite wanting to never ever ever have to acknowledge that Deku actually knows about this kind of stuff, the belligerent, combative asshole inside of him that still occasionally rises up to throw down with Deku decides to rear its head at that moment, and the next thing he knows he’s blurting out: “Just because you’ve seen it in shitty porn doesn’t mean it’s real, dumbass.”

He can see Deku roll his eyes from where he’s sitting, but the bastard doesn’t turn to look at him. “It’s not just from porn,” he mumbles.

“So you’ve gotten it to happen, too?” Sero asks, and Deku sighs, glancing across at him.

“No,” he replies. His eyes flick to Kaminari briefly, so briefly, but Katsuki still catches it. Then he’s shrugging at Sero again. “But I know it’s a real thing.”

Kaminari’s grinning at him, but it’s this weird, knowing kind of thing. He’s sitting beside Deku on the floor, elbow propped on the coffee table with his fist sort of blocking his mouth. Like he’s trying to hide whatever his fucking expression is.

Katsuki’s eyes narrow.

“I love you guys,” Kirishima says, voice muffled because he’s still burying his face in his hands, “but I can’t with this entire conversation.”

Todoroki ignores him like the asshole he is. “Do you recommend fingers or toys?” he asks Kaminari, and Kaminari shoots him a finger gun and a wink.

“Both, dude. Or someone’s tongue if you can swing it.”

Katsuki’s entire body abruptly flashes hot. For no fucking reason. He watches the red from Deku’s ears bleed down into his cheeks.

“Holy shit,” Ojiro breathes, and Kirishima makes a strangled sound.

Sero snorts. “Now I know you’re full of it.”

Kaminari just shrugs and the conversation finally starts to peter out there. Some of them try to move on to other topics, but Ojiro bails before they can get too far into anything else and Kirishima’s not far behind him, his face having never quite returned to its usual color.

Deku smacks Kaminari’s thigh beneath the coffee table as soon as they’re gone. “You made them so uncomfortable!” he hisses, his own freckled cheeks still a bit pink.

“They’ll be fine,” Kaminari says, waving it off. “Hell, hopefully I’ve opened up a whole new world of possibilities for them.”

Deku scoffs and Sero makes a disbelieving sound in the back of his throat that everyone ignores. Honestly, though, Katsuki’s probably inclined to side with him. His head’s kind of swimming and he hasn’t turned a page in his goddamn textbook since Kaminari first asked his fucking question.

He’s still a bit stuck on the tongue comment.

Fuck. He can’t–

Okay.

First of all…

How?

Like, Katsuki isn’t stupid. He’s not that uninformed. Just because he’s never tried it himself doesn’t mean he’s, like, totally unaware that there’s shit that can feel good if you…

Well.

WELL.

There’s a reason some guys sleep with other guys, right?!

Aside from the obvious. That it’s just what they’re drawn to or whatever.

There’s something else that’s worthwhile about it.

Which Deku seems to know.

Deku and Kaminari.

The competitive part of him is a little pissed those two assholes apparently have some kind of knowledge that he’s lacking.

But all of that fucking aside… Okay, he knows what a goddamn prostate is and no one’s tongue is reaching that thing. Right?

Probably?

The longer he thinks about it, the warmer his face gets. God, fuck, he doesn’t WANT to be thinking about it. But now Kaminari and Deku are whispering to each other, having some kind of hushed conversation that involves a lot of Deku gesticulating aimlessly while Kaminari looks supremely unconcerned, and Katsuki’s annoyance balloons in his chest until he’s gritting his teeth and trying not to seethe at the pair of them for knowing something he doesn’t.

“I thought you were into girls!” he snaps out of nowhere, and they both turn wide eyes up to look at him.

Sero snickers somewhere off to the side. Kaminari just lifts an eyebrow, pointing between himself and Deku. “Who, me? Or him?”

Seeing as how Katsuki absolutely did not mean to rewind them all the way back to that fucking conversation, he just scowls down at them for a moment that lasts a few ticks too long, his shoulders slowly starting to hunch up around his ears. “Both,” he eventually growls.

“You can like more than one thing, Kacchan,” Deku says easily, and Kaminari nods.

“Plus, like – girls have fingers, too. And mouths. And strap-ons.”

Katsuki chokes on absolutely fucking nothing as Sero slams his textbook shut. “Dude. Come on, there’s no way you’ve slept with any of the girls at this school. You would’ve blabbed the second it happened!”

“I’m just saying,” Kaminari says, rolling his eyes. “The option is there.”

“I’m happy to know that some of us feel we’re close enough to have this kind of talk,” Todoroki says blandly as he starts packing up his books.

Deku winces a little. “Sorry, Todoroki.”

“No, I’m actually serious.” He stands up, shouldering his bag. “I think we all bonded.”

“Shut the fuck up,” Katsuki grouses.

Todoroki pins him with one of his unnerving goddamn stares. “Noticed you didn’t answer Kaminari’s question.”

“Points for observation,” Katsuki says, voice flat. “Thought you were leaving.”

He does, giving the rest of the room a wave over his shoulder. Sero isn’t far behind him, and once Aoyama notices that most of the room has cleared out, he stands from his chair, as well. “Have fun,” he trills, trailing out after the other two.

Katsuki’s not sure what the fuck that’s supposed to mean.

He’s also not sure why he’s still here. He probably should’ve been one of the first to leave. Every single extra in this damn class knows he likes to go to bed early, he could’ve jumped off this sinking ship at any fucking time and it probably would’ve been fine.

But he’s still here.

Deku mutters something else to Kaminari, and he throws his hands up in response. “Oh my god, Midoriya, I’ll apologize to them tomorrow. I didn’t know they’d be so weird about it!”

“Not everyone likes being an open book, Kaminari.”

“Alright, alright. Geez.”

Katsuki spins around and plants his feet on the ground. Both Deku and Kaminari shoot him startled looks again.

“I wanna know what the fuck you two were talking about,” Katsuki says, before he can even begin to consider what a monumentally bad idea it is.

Deku blinks. “Ah… I was just telling Kaminari I think he went overboard. Kirishima and Ojiro were embarrassed–”

“Not that.” Katsuki frowns. Kaminari, meanwhile, has some sort of holy terror of a smirk starting to stretch across his face. Katsuki hates it. He also can’t look away from it and suddenly finds himself at a loss for words. “The – before,” he manages to force out. “That shit you were spewing. About how it’s possible.”

“Oh,” Deku says softly, realization dawning. His eyes are round and tinted with disbelief, like he can’t believe Katsuki’s actually asking for an explanation.

Katsuki can’t believe it either. But apparently he fucking is, so.

He swallows. Deku’s still staring at him.

Kaminari abruptly pushes himself to his feet and starts sweeping both his and Deku’s papers and books into one giant pile.

“Hey, wait!” Deku cries the second he notices, but Kaminari quickly interrupts him.

“My room.” There’s an excited undercurrent to his tone. “It’s not that late, someone might still come down here.”

Deku blinks after him as he sweeps out of the room. Katsuki isn’t exactly sure why the fuck they need to be anywhere else to keep talking about this bullshit, but he guesses it would be awkward as all hell to have someone else roll up in the middle of Deku fucking explaining something about tongues and getting off and – shit, yeah, no, he needs to be literally anywhere else right now where people can’t see or hear this. Like maybe in a metal container under the goddamn ocean or something, holy shit.

He's off the couch in the next second, following Kaminari, and he hears Deku scrambling to catch up with the two of them.

The elevator ride is the fucking worst. At least, Katsuki thinks it is. Kaminari seems fucking fine, bouncing on the balls of his feet, a sort of eager energy coming off him in waves. Deku, on the other hand, is fidgeting in a way he hasn’t in months. His fingers are twisted in the hem of his shirt, and Katsuki actually has to stop himself from reaching over to slap at his hands to make him stop.

Kaminari yanks Katsuki’s textbook away from him once they make it to his room, and dumps all of their combined schoolwork onto his desk. Then he whirls around to face Katsuki as Deku is shutting – and fucking locking, what? – the door, his hands propped on his hips.

“Do you want us to tell you or show you?” he asks.

Deku immediately groans under his breath, leaning back against the door and covering his face like Kirishima had earlier. It takes Katsuki a minute to catch up, to realize just what the fuck Kaminari is suggesting, and when it finally clicks in his brain he straight up forgets how to breathe. His heart thuds against the back of his ribcage as his stomach decides to start up some kind of shitty acrobatics routine, and it’s suddenly way too warm in Kaminari’s room.

“Show?” he just barely manages to say, very nearly scandalized, except Kaminari seems to take that as his answer and instantly moves toward him. Katsuki hastily takes a step or two backwards and ends up bumping right into Deku, whose hand comes up to steady him, landing lightly on his lower back. He quickly jerks away from that, too. “Hold up, assholes, what the hell is going on?” He peers between the two of them. “Are you two fucking dating?”

Kaminari snorts as Deku immediately shakes his head. “No,” they say in chorus, before Kaminari continues, “We just mess around sometimes.”

He says it like it’s such a simple thing. So damn nonchalant, no big deal here, we’re just casually fucking. Katsuki can’t wrap his brain around it. He gapes at the pair of them, unable to stop himself. “How the fuck did that happen?”

Kaminari shrugs. “I figured if there was anyone who spent too much time on the internet growing up and wouldn’t mind experimenting, it’d be this guy.”

“I like knowing things,” Deku adds, looking somewhat embarrassed, but not nearly enough for what the situation calls for in Katsuki’s opinion.

“So you just…” He gestures randomly, a furrow starting to form between his brows. “That’s how you know this stuff? You’re doing sex shit with each other?”

“…Sex shit,” Kaminari repeats, chuckling. Deku’s standing next to him by now, and Kaminari sways sideways to bump into his shoulder. “Yeah, pretty much. Midoriya’s really good with his mouth.”

Katsuki wants to make some snarky comment about how he should be, because he certainly uses it fucking enough, but his brain accidentally conjures up a mental picture of Deku on his knees in record time. Mouth open, tongue out, dragging across Katsuki’s–

“For fuck’s sake,” he chokes out, gaze swinging wildly between the pair of them, these two shitty little perverts who just keep innocently staring at him with their goddamn baby deer eyes.

“Bet he could make you come,” Kaminari adds slyly. Deku thwaps his hand backwards into Kaminari’s stomach, giving him an exasperated look. But exasperated is all he is – whatever mild embarrassment he’d been inflicted with earlier seems to have vanished remarkably quickly.

Which is just really fucking unfair considering Katsuki’s still reeling.

“What, without touching my dick?” he grumbles, eyes narrowing into a glare. “That shit you were saying earlier?”

“He does it to me on a pretty regular basis, dude.”

“You don’t think I can?” Deku asks, eyebrows raising, giving him a challenging look, and oh. Oh, this smug fucking asshole.

“I know you can’t,” Katsuki snarls back, because sometimes he’s a predictable motherfucker and he literally can’t stop himself from taking the damn bait. The corner of Deku’s mouth quirks, tugging upwards into a smirk, and Katsuki actually fucking shivers.

Kaminari leans forward, grinning. “So you wanna?”

Katsuki barely even knows what he’s agreeing to but he finds his hands closing into fists anyway, battle ready instincts propelling him onward for all the wrong reasons. “Bring it on, shitheads!”

“Kacchan,” Deku murmurs, eyes locked on him, glinting intently. “Be really sure.”

That just makes him bristle defensively, unfortunately. “I’m fucking sure, Deku!” he spits, and Deku sighs. His competitive aura drops a bit as his head tips to the side curiously.

“Have you ever even had anything inside of you?”

Katsuki splutters, his cheeks flaring hot. “What – no, but what does that fucking matter?”

“It doesn’t,” Kaminari says. He steps in close, closer than he’s ever dared to get to Katsuki even with as touchy-feely as he normally is, and slides a hand under his shirt with zero hesitation. Katsuki sucks in a breath – he’s never had someone touch him like that before. And it’s just his fucking stomach.

Holy shit, what the fuck is he getting himself into?

Is he seriously about to do this? With Deku?

Well, and Kaminari.

Fuck, with both of them. With two people.

It all feels really overwhelming really quickly, he can feel his eyes blowing wide, and Deku seems to notice. Because of course he does.

“I promise you it’ll feel good,” he says softly, taking a step back while Kaminari continues to splay his palm over Katsuki’s abs. “But tell us if you want to stop.”

Katsuki scowls past the flush that’s making his cheeks burn. “I don’t need–”

“Kacchan,” Deku interrupts. He looks deadly serious all of a sudden. Katsuki holds his gaze for a second before snapping his eyes away with a huff. “I mean it.”

“Fucking fine, alright? Shut up already, just get on with it!”

Kaminari presses closer and suddenly his mouth is on the side of Katsuki’s neck, just under his jaw. A startled sound escapes him, but Kaminari only lightly kisses at his skin for the space of a breath or two before he’s pulling away entirely. “Pants off, Kacchan.”

Shit, Katsuki doesn’t know if he can handle both of these assholes calling him that right now. He fists his hands unthinkingly into the material of his shorts, but that’s as far as he gets before he finally falters.

Look, he regularly gets undressed around people in the locker room all the time, and he’s not exactly shy about his body, but it’s just a little fucking awkward trying to get naked when you’ve got two pairs of eyes flat out staring at you, okay?

Also, he’s just this fucking second realizing that his dick has seemed to clue into what’s happening here faster than the rest of him. It’s definitely beginning to perk up with interest, the fucking traitor.

Katsuki swallows. “I’m not stripping by myself, you fucks.”

“Fair enough,” Kaminari says, and a second later his shirt is gone.

Deku’s slower about it only in that he drops to his knees first, getting comfortable on the ground before his fingers twist around the hem of his t-shirt and slowly drag it up over his head. “You might as well stop standing around,” he says, shaking his head after he’s tugged the shirt away and dropped it beside him. His messy green curls bounce lightly with the movement, as Kaminari settles cross-legged next to him and leans back to rest on his hands. Kaminari isn’t as jacked as Deku is but his toned muscles are still distracting as all fuck, especially with the way he’s got himself on full display all stretched out like that.

Katsuki’s mouth is suddenly so fucking dry.

He lowers himself slowly to the ground and Deku instantly crawls toward him, pushing him onto his back before Katsuki can even figure out if he wants to balk and resist or not. Deku doesn’t give him a single second to think about it further, just crowds into Katsuki’s space, right between his goddamn legs, and reaches out to grasp the bottom of his shorts. He’s all intense focus now, eyes sparking with determination, and Katsuki’s too preoccupied with being surprised by how much the look on Deku’s face makes something tingle in his gut to stop him from yanking his shorts and boxers down over his knees in one fluid motion. Deku keeps pulling until the clothing clears Katsuki’s feet, then he’s back between his thighs and blocking Katsuki’s instinctual urge to squeeze his legs closed.

Hah.

Fuck.

His dick bobs gently in the open air, just suddenly out there, still not all the way hard but certainly getting there.

A million jumbled curses ring through Katsuki’s head and he clamps his mouth shut around the flustered noises trying to escape his throat. Deku’s hands land on his thighs, skimming lightly over his skin down toward his hips.

“Nice,” Kaminari murmurs.

“You okay?” Deku asks quietly, and Katsuki can’t even force himself to be annoyed about it. He just nods rapidly, not trusting himself to speak as Deku’s fingers spread wide, ghosting over his stomach and then sliding back down toward the crease of his thighs. It’s almost unnerving how close he gets to Katsuki’s dick. Katsuki inhales sharply as scarred hands drift nearer still, his hips jerking up towards Deku’s touch without his fucking permission, and heat immediately floods his face.

Deku laughs a little, but it’s somehow not irritating as shit.

Then he says: “You’re not gonna last,” and oh, THAT is.

“Fuck you,” Katsuki grits out, his voice kicked up a couple notches higher than it should be.

“It’s totally normal when you’ve never done anything before,” Deku continues, since apparently he has a death wish or something. “Don’t worry, I’ve got a plan.”

That might just be the least reassuring thing Deku has ever fucking said.

His hands circle beneath Katsuki suddenly, gripping his ass and making him exhale in a rush. God, it’s weird, it’s so fucking weird that it’s Deku touching him like this. But he still flashes hot as Deku’s hands flex, massaging into his muscles, and he finds his knees unwittingly falling open a little wider.

“Which part actually caught your interest?” Deku asks, voice still low and steady as his fingers continue to dip lower, coming dangerously close to touching a part of Katsuki that’s never gotten any attention outside of his usual bathing practices. Katsuki’s breathing has gone all shuddery. “You like the idea of something being inside you?” And honestly, he really hadn’t ever thought much about that before tonight, but– “Or do you want someone’s mouth on you?” Deku says, dropping down to place an open-mouthed kiss against the soft skin of Katsuki’s inner thigh, and that actually unravels him a bit. It’s hot where Deku trails his lips against him and Katsuki can’t stop his hips from twitching again.

“That,” he breathes, hands scrabbling against the carpeted floor, looking for something to grasp. “That, it was that, fuck, Deku–”

“Denki,” Deku says abruptly. “Lube.”

Katsuki had almost fucking forgotten Kaminari’s still there, just watching Deku feel him up and shit, and an extremely visible flush works its way from Katsuki’s face down his neck to take over what can be seen of his chest beneath the tank top he still has on. His eyes dart to the side, watching as Kaminari stands and goes to grab what looks like a tube of lotion from the drawer of his nightstand. Except it’s not lotion, it’s fucking lube, Deku just said that. He slaps it into Deku’s outstretched hand when he comes back and then positions himself behind Katsuki this time when he sits down.

A moment later, Katsuki’s being dragged backwards over Kaminari’s lap and he finds himself blinking up into the other blonde’s face. “The hell,” he mutters, but Kaminari just grins.

“More comfortable this way,” he says, and fine, sure, whatever. Katsuki drops his gaze back down to watch Deku as he squirts some of the slippery liquid over his fingers and spreads it around.

Something like anticipation begins curling in his chest.

“Gonna show you something real quick,” Deku says, and Katsuki catches how his voice wavers, going deep and gravelly in a way he’s never heard from him before. “Then I’m gonna blow your mind, Kacchan.”

“Tch.” Katsuki rolls his eyes. Can’t help himself. “I’ll believe it when I–” He chokes off there, wheezing out a surprised breath as Deku’s hand vanishes between his legs and fingers are suddenly brushing over his hole. “Fuck, fuck, Deku, you – nnngh.”

His legs tense, threatening to close around Deku again when the other boy rubs him gently, teasing right at his entrance as Katsuki’s hole flutters against him. Deku pushes one of his thighs out wider, making room, and then evidently Kaminari decides to help by reaching down to hook his hand behind Katsuki’s knee and pulling back to hold him open.

It's pretty much the most exposed Katsuki’s ever felt in his entire goddamn life, but then the tip of Deku’s finger is pushing into him and his thoughts scatter completely.

Not that it really feels like anything. It’s just strange. He can’t help clenching around the intrusion when Deku slides in deeper.

“Relax,” Deku murmurs, pulling out slowly only to push right back in again. Katsuki forces his eyes open just so he can glare at him, though he’s not entirely sure at what point they closed in the first place.

“I am relaxed,” he growls. Or tries to growl. He mostly sounds kind of bewildered, but in an aggravated way. He doesn’t necessarily like just being along for the ride, not knowing what the hell Deku’s next move is, not knowing what he’s expected to feel here. Is something supposed to happen? Because it’s not. Deku just keeps pumping his finger in and out and it’s maybe got him squirming a little, but aside from that…

Deku hums lightly. “I’m gonna add another one.”

“Okay?” Katsuki says uncertainly, and then he realizes why Deku gave him a warning after he slides that second finger in alongside the first. There’s definitely more of a burn this time, his rim stretched wider than it’s used to. Katsuki flinches before he can reel it in, unprepared for the change, and his lower back arches off the floor a bit.

“Don’t worry,” Kaminari says from above him, combing his free hand through Katsuki’s hair. “You get used to it really quickly.”

“Shut up,” Katsuki mumbles. “M’fine.”

He IS fine, he’s just got Deku stroking his goddamn insides and that’s definitely not something he thought he’d have to deal with today when he woke up this morning.

Deku keeps his fingers steadily moving, pushing in a little deeper each time. It still isn’t…hmm, it doesn’t seem like it’s doing anything for him, but his breaths are starting to come a little more quickly, his muscles tensing and releasing as Deku occasionally brushes against weirdly sensitive places.

Then suddenly his fingers give a purposeful curl, stroking into one particular spot, and Katsuki inhales sharply, his head snapping back into Kaminari’s lap as his knee strains against his hold. Deku repeats the same motion almost immediately and this time Katsuki can’t even begin to describe the goddamn noise that tears out of his throat. Whatever Deku’s touching is intense. It sends sparks jolting through him and has heat lancing up his spine in a way that’s different than every time he’s wrapped a hand around his dick. Somehow it feels like he’s throbbing everywhere, his body jumping and twitching as Deku rubs against that spot again.

“Deku, fuck, what–” Katsuki starts to say, voice garbled and nearly frantic, and in the next second Deku’s pulling his hand free with an embarrassing squelch. Katsuki blinks up at the ceiling, his chest heaving as he pants, and then he gets his elbows under him and pushes himself up until he can glare down at Deku. “The hell, nerd, I didn’t say stop.”

Both Deku and Kaminari snicker. Deku in particular looks horribly pleased, and it takes all of Katsuki’s resolve not to kick him in the face. “I just wanted to show you,” he says, and Katsuki wonders what the fuck that means for all of half a second before his brain decides to chime in with an all too chipper: Your prostate, you absolute dumbfuck.

His brain sounds like Kaminari suddenly, apparently. Fucking wonderful.

Katsuki scowls. “Sure, great,” he grouses. “I didn’t come, though.”

Deku just rolls his eyes. “I’m getting there,” he says, and then he’s pushing Katsuki’s thigh up and out, shifting around until he gets Katsuki’s leg over his shoulder. Kaminari tugs his other leg even wider and Deku ducks down, low enough that Katsuki can feel his hot breaths warming the place where his fingers had just been buried deep.

His eyes quickly go round.

Kaminari slides his hand down from Katsuki’s hair to his chest, slipping it under his tank top to spread wide over his pec. Katsuki’s elbows give out and he drops back down into Kaminari’s lap, just as Deku reaches out to grasp his ass, spreading his cheeks apart. He feels his face go hot, some sort of strained sound escaping him, and then Deku pushes forward and flattens his tongue right against his hole.

Oh god, oh shit, oh fuck.

Katsuki gasps – damn near yelps, in fact, but he manages to swallow it back at the last second. Deku draws his tongue over him again, so fucking slowly, and Katsuki’s toes curl, both of his knees trying to squeeze closed around Deku’s head. Neither Deku nor Kaminari are having it, though. They keep him splayed open as Deku dives in, licking at him in long, torturous strokes that have his head spinning in no time.

His entire body burns, heat pooling rapidly in his gut as his skin tingles and sweat dots his forehead. Some distant part of him is vaguely mortified that Deku’s literally got a face full of his ass right now, that the nerd is fucking eating him out like he’s a goddamn meal, but the arousal spiking within him is all-consuming and drowns out any lingering discomfort in moments. Deku’s going at him with a single-minded intensity, tongue dragging around his rim before his mouth just fucking closes over his hole and sucks.

“Shit, shit, shit,” Katsuki chants, barely hearing himself, his whole back arching off the floor. He’s rock hard now, dick lying flat against his stomach, swollen and flushed. His heel digs into Deku’s back, but that only pushes him closer and spurs him on. His fingers grip Katsuki’s muscles, prying him open, and then he lets his tongue stiffen and prod forward, dipping shallowly inside.

Katsuki cranes his neck, head falling farther back as he chokes on a groan and writhes. He’s still trying to hold back, trying to keep his cries to a minimum. The competitive edge in him doesn’t want to give Deku the satisfaction, doesn’t want him to fucking know just how much having a mouth on his ass is affecting him. He still remembers saying Deku couldn’t get him to come without touching his dick – something that, unfortunately for him, seems to quickly be turning into an inevitability.

Then Kaminari brushes his thumb over Katsuki’s nipple and Katsuki loses any and all ability to keep himself even halfway quiet.

He still clenches his teeth anyway, making an attempt like the stubborn bastard he is. “Hnnnnnggh–” Kaminari strokes his chest again, fingers circling his nipple and squeezing gently as Deku burrows his tongue deeper, slowly thrusting in and out with it. “Ah! Fuck, fuck – goddammit, you f-fucking shits!”

“You’re doing great,” Kaminari says unhelpfully, leaning forward a bit so he can grin down at him. Katsuki just squints blearily back, his mouth hanging open as he draws in gulping breaths.

“Fuck – nnngh – OFF,” he growls. He belatedly notices he’s reaching back and clutching one of Kaminari’s arms, which is really embarrassing because he doesn’t even know when the hell that happened. Still, he can’t seem to let go, and ends up squeezing him even more tightly when Deku does something that makes a particularly sloppy slurping sound. God, he feels so fucking wet down there. Maybe his ass is malfunctioning, he thinks, half hysterical and out of his mind as Deku continues to send hot jolts of pleasure coursing through his limbs. Maybe he’s getting wet the way girls do – at least, he’s pretty sure that’s a thing that happens with them.

Or maybe Deku’s just drooling all over him as he ravishes his ass. He pulls back a little to tease at his entrance instead, tracing his tongue along his rim. It’s absolutely fucking maddening. Katsuki’s hips roll upwards into Deku’s face, looking for more contact, needing him to bury his tongue inside again or cover as much of his hole as possible, either option really, he’s not picky. Deku makes a pleased sound that vibrates against Katsuki’s skin, has his sharp gasps stuttering for a moment. “Ah, ahh, shit, Deku, Deku, holy shit,” he garbles out.

Everything’s starting to lock up, pressure mounting in his gut, his ass clenching as the pleasure builds and builds and builds.

Katsuki’s eyes go wide the second he realizes he actually is going to come from this.

Like, holy shit, Deku’s really about to make him have a fucking orgasm while completely ignoring his poor dick. He’s so goddamn erect at this point it’s almost painful, he just wants to rut against something, and he’s actually got a free hand that he could curl around himself but for some reason he doesn’t. He just lets Deku’s tongue, currently flattening over his hole again, covering as much of him as possible and dragging back and forth over his sensitive rim, bring him all the way to the edge.

Deku dips forward once more, breaching Katsuki, pushing in as far as he can, and Katsuki immediately goes tense, his body jerking uncontrollably as release hits him like a fucking bus. His jaw drops down, back curving, his dick pulsing against his stomach. Deku keeps milking him through it, tongue still laving at his ass. Katsuki can feel his hole winking against him, his whole body twitching and his dick continuing to spasm until it abruptly gets uncomfortable.

“Stop, stop, stop,” he pants, squirming backwards into Kaminari, oversensitive fucking everywhere all of a sudden.

Deku listens to him, at least. He pulls back, his mouth and chin shiny with saliva, but then he’s clambering up over Katsuki and leaning down to find his lips.

Katsuki’s never actually kissed anyone before, but then he’s also never had someone’s tongue in his ass so this seems pretty mild in comparison. He’s too out of it to resist anyway, his head’s all floaty and shit, and Deku’s really going for it. The other boy presses against him, prying his lips open and diving right in. It's all Katsuki can do to keep up, his free hand coming up to bury in thick, green hair as he kisses back. Something in his chest tightens and he feels like maybe this whole thing is important in a way he can’t really grasp yet, but then that initial thought comes slamming back into him and he quickly wrenches his mouth away and twists his head to the side.

“Augh, what the fuck, your tongue was just in my ass, dammit!” he complains.

“Yeah, I was there,” Deku says breathlessly. He’s hard against Katsuki’s thigh, something Katsuki is only just noticing.

Hmm.

Kaminari stretches forward over Katsuki’s head. “Here, let me,” he says, and Deku doesn’t even hesitate, just closes the distance between them and starts kissing him instead.

Just right there above Katsuki, like they’re putting on a goddamn show.

Katsuki watches like it is one. He couldn’t pull his eyes away if he tried.

Then Deku reaches down to trail his fingers over Katsuki’s still sensitive dick, and Katsuki yelps, bucking up and causing the other two to break apart. “Deku,” he snaps, and Deku backs off with a quick laugh.

“Sorry,” he says, settling back in between Katsuki’s thighs. He snatches up the lube again, squirting some more over his fingers, and Katsuki can only blink at him.

“The fuck are you doing?” he asks, somewhat warily. Both his legs are free now, at least, so if Deku pulls some shit he can probably just knee him in the face or something.

Deku does, in fact, pull some shit, his hand disappearing between them and finding Katsuki’s hole again with startling speed. His fingers slip inside ridiculously easily this time, two of them buried to the hilt with almost zero resistance, and Katsuki can only suck in a breath in response, too shocked to remember his kicking plan.

“What – what,” he tries to say, clenching around him, but Deku’s already pumping in and out, more intently than he did earlier.

“Wanna come again?” Deku asks, and Katsuki just makes some sort of pathetic, high-pitched keening sound in response.

Deku’s grin stretches wide. Both of Kaminari’s hands reach down to push his shirt up, his palms dragging over Katsuki’s chest and thumbs fondling his nipples.

He can already feel it in his ass again, that overwhelming pleasure thumping through him with every prod and stroke and press of Deku’s fingers. It builds up quickly – almost too quickly. His dick twitches feebly back to life and Katsuki’s chest heaves. It’s too much, it’s too fucking much, but it’s also so, so good.

Tears prick at his eyes, a sob breaking free from his throat as his hips shift, moving to meet Deku’s thrusting fingers, rolling against him like his body’s got a goddamn mind of its own. His thighs are damn near crushing Deku, squeezing at him and trying to pull him in closer.

Oh god, oh god, oh god, fuck, fuck–

Deku pushes in deep, letting his fingers curl, and Katsuki fucking comes AGAIN, his mouth opening around a soundless cry as he does. It’s different than before, different than it ever is when he’s jerking himself off. It wracks his whole body, spreading out from his gut and sending shocks shooting down his limbs. Everything goes taught for several long seconds as he rides his orgasm out, wave after wave coursing through him until he finally just fucking collapses.

He's completely boneless afterwards, panting like he’s just run twelve marathons in a row or some shit. Trying to wrangle his thoughts is completely fucking impossible. Everything’s all fuzzy and he’s still trembling all over, aftershocks jolting him every so often as he comes down from the release.

Holy shit.

What the fuck.

“Dude, that was awesome,” Kaminari says, and Katsuki somehow manages to pry his eyes open and glower up at him. Kaminari is still running his hands lightly over his torso, but it just feels kind of nice now.

Deku pulls his fingers free – god, Katsuki hadn’t even realized they were still in him, but he suddenly can’t stop thinking about how fucking great it felt to clench around them when he came. Deku looks at him, eyes wide, his lips quirking into a kind of knowing smile.

“Alright, Kacchan?” he asks, so goddamn innocently. Like he didn’t just force an entire second orgasm out of Katsuki without any fucking warning.

Katsuki huffs. “You’re an asshole,” he grumbles. It’s the best he can do. His brain is totally fried. Deku chuckles and reaches out with a single finger to poke at the head of Katsuki’s dick, and this time the shock of it actually does make Katsuki whip his knee around to clock Deku in the side. He instantly shoots him a glare, his face going hot. “Fucking– You touch my dick again and I’m gonna explode your dumb face, you damn nerd!”

Deku holds his hands up, looking insincerely sheepish. “Sorry, my bad.”

His fingers are still glistening, slick with lube. Katsuki can’t help staring at them.

Kaminari shifts out from under Katsuki. “He’s been wanting to do that to you for so long,” he says, sounding amused. Katsuki can’t be bothered to properly lift himself into a sitting position; he just lies there on the floor, trying to recover, to get his heaving breaths under control, vaguely wondering if he’ll ever be able to move again.

As such, it takes a few beats for the words to really land. By the time Katsuki actually hears them, Kaminari has already crawled over to Deku and attacked him with another deep kiss.

“Denki,” Deku murmurs against him, separating briefly only to dive right back in. It’s sort of mesmerizing to watch. “I need you in me.”

“Mm, yeah?” Kaminari asks, grinning into their next kiss, and Deku just nods.

“Yeah. Yes. Right now.” He flops onto his back and starts shuffling out of his shorts.

Katsuki’s eyebrows go up.

Kaminari grabs the lube. “Condom?”

“Yeah. No prep, though, just do it.”

“You sure?” Kaminari heads over to his nightstand again and fishes around inside until he pulls out a little foil packet that he quickly tears into with his teeth. He shoves his own shorts and underwear down at the same time, kicking them off to the side and then falling to his knees near Deku.

They’re both so fucking hard, Katsuki notices. He doesn’t know why he’s looking, but then again, they obviously don’t care.

And it seems more than a little fucking stupid to be worried about shit like that now.

“I’m sure,” Deku says, nodding. He has his knees propped up, legs spread wide. “Hasn’t been that long. Shit, come on, hurry!”

Katsuki rolls onto his side. Deku’s legs are blocking his view, the stupid fuck–

“Damn, Izuku, chill. I got you.” Kaminari rolls the condom over his dick like a fucking pro. And, like, obviously Katsuki knows now that they’ve been doing this for a while. But it’s clearly, definitely been a while, there’s nothing new about any of this, no hesitation in the way Kaminari slathers his dick up with lube and presses right into Deku.

They both groan, Deku’s back arching, his legs coming up to wrap high around Kaminari’s torso. His thighs are so damn thick. Katsuki can’t stop thinking about what it’d feel like to have them squeezed around him.

Then Kaminari starts moving, hips snapping into Deku with confident, powerful thrusts, and Katsuki’s newly born pervert brain pivots and begins forming mental images about being on the receiving end of that instead.

He’s fucking exhausted, body totally spent, but there’s a spark of arousal in his gut anyway. He’s not getting an erection again anytime soon, but fuck if his dick doesn’t try.

“Denki, Denki, Denki,” Deku chants, neck craning backwards. Katsuki wants to run his tongue over his collarbone.

–For fuck’s sake.

Okay.

This might be a problem.

He heaves himself up and gets his knees under him, then scoots closer to the other two. Kaminari immediately looks over at him, eyes glinting as he pants.

Katsuki swallows and glances down at Deku, who’s also already watching him. They’re both waiting to see what he does, Katsuki realizes. Kaminari has slowed a little, his pace not as relentless as before, though he seems like he’s pushing deeper into Deku than he was. He’s got a rosy blush high on his cheeks, meanwhile Deku’s flushed all the way down his chest.

“Why a condom?” Katsuki asks.

Deku hums, struggling a little to find words as Kaminari no doubt works him closer and closer to release. “It’s – it’s annoying to…to clean up. After. Without one,” he eventually manages to get out.

Considering the mess on Katsuki’s stomach and the bottom of his shirt…yeah, he figures that makes sense.

“You gonna come like that?” is his next question, eyes narrowed. After his experiences tonight, meager though they might be, he’s pretty sure he would. Or could, at least. His ass keeps clenching in time with the movement of Kaminari’s hips, like he’s trying to pretend he’s in Deku’s place. It had felt like kind of a lot just with Deku’s two fingers earlier so trying to imagine a whole dick up there makes him go a bit lightheaded, but he knows he’d fucking try it in a heartbeat.

Deku tries to speak and only manages to let out a string of mangled, incoherent sounds as Kaminari shifts and changes the angle of his movements. He ends up just shaking his head.

Kaminari laughs breathlessly, dragging a hand down Deku’s stomach. “He needs help,” he says, then sends a piercing look directly at Katsuki. “Wanna give him a hand?”

Katsuki reaches out, not needing anymore prompting than that. Deku’s dick is red and swollen, looking ready to burst at the slightest touch. He just sucks in a breath as Katsuki’s fingers curl around him, though, jaw dropping. “Oh god,” he chokes out. Katsuki tightens his grip and starts sliding over the length of him.

He's never had another guy’s dick in his hand before.

It’s weird.

And so fucking hot.

Kaminari’s biting his bottom lip as he watches them. He picks up the pace, rocking Deku’s body as he pounds into him. Katsuki doesn’t have to do much more than keep a loose hold on Deku because his dick thrusts up against his palm with every jerk of Kaminari’s hips.

“K-Kacchan, Kacchan!” Deku cries. “Ahh, ah, more, Denki, come on–”

“Bakugou,” Kaminari gasps out, and when Katsuki turns his head to look at him, he lurches forward, planting his mouth on Katsuki’s with a desperate moan. Katsuki kisses back unthinkingly, his lips parting easily, tongue stroking against Kaminari’s for the few seconds it takes for Kaminari to shudder and slam into Deku one final time. He jerks, grunting against Katsuki’s mouth as he tips over the edge. “Fuck, fuck, oh fuck,” he breathes.

Katsuki only pulls back when Deku whines beneath them. “Kacchan. Don’t stop, shit, please!” He’s squirming around Kaminari’s spasming dick, trying to roll up into Katsuki’s grasp, practically sobbing as he gulps for air, friction, relief. Katsuki squeezes him, gives his hand one strong jerk, then another, and then Deku’s abruptly crying out and spilling over Katsuki’s fingers.

Deku’s chest heaves. Katsuki keeps right on tugging at him until his green eyes suddenly blow wide.

“Ah, Kacchan, fuck – wait!” He tries to roll away, except he’s still stuck on Kaminari’s dick and the other boy clamps his hands around Deku’s waist, holding him in place because sometimes he’s just as much of a bastard as Katsuki is.

Katsuki leans down, giving Deku his most shit-eating grin. “Payback’s a bitch, ain’t it?”

Deku laughs, high and slightly hysterical. “You’re such a jerk, Kacchannnghh.” He twists again, knees instinctively trying to close, and he’d only have to activate, like, two percent of One For All to shake both of them off, but he doesn’t. So he’s probably fine.

Katsuki finally lets go of his oversensitive dick anyway and Deku instantly slumps onto his back, wheezing.

“Wow.” Kaminari lifts an eyebrow at Katsuki. There’s a warm hue to his sweat-damp skin and a bright smile curved across his face. He’s fucking beautiful, and that’s not a thought Katsuki’s had about anyone, like, ever. Something swoops in his stomach, and Kaminari continues, “You learn fast.”

“Kacchan’s smart,” Deku says, sounding dazed. Katsuki pulls his eyes away from Kaminari to look down at the guy who’s somehow been in his life through every major milestone, now including doing sex shit for the first time, what the actual fuck. He’s way more of a disaster than Kaminari is, hair flying absolutely every direction and his cheeks ruddy, not to mention the mess across the firm planes of his stomach.

Katsuki wants to kiss him. Except he still had his tongue in Katsuki’s ass earlier and that’s still very much ew, so he swings around to lay one on Kaminari instead, feeling abruptly and disconcertingly needy. Kaminari indulges him, leads him into a slower, deeper kiss that soon has Katsuki’s everything tingling.

Then he zaps him with a slight shock of static electricity and Katsuki jerks back with a frown.

“Man, you gotta let me pull out,” Kaminari says, laughing.

Deku gives his head a faint shake. He was obviously watching them. “No, I’m fine…”

Kaminari pulls out anyway – Katsuki finds himself leaning over to watch which is probably so fucking weird, but seeing them connected was fascinating as shit and watching Deku’s hole clench around nothing once Kaminari is free is equally as intriguing.

Neither of them comments on his newfound interest in…whatever all of this is. Kaminari just ties off the condom and tosses it while Deku pushes himself up so he’s sitting cross-legged.

“So,” he says, elbow resting on his knee and his cheek propped against his fingers while he peers at Katsuki. “Ass-only orgasm. Twice.”

Katsuki goes hot all over again and kicks his heel into Deku’s thigh. “Shut up!”

“Told you he was good with his mouth,” Kaminari says, looking smug and amused all at once. “Shit, it still took a couple tries before he could get me off like that, though.”

“To be fair, I didn’t know what I was doing in the beginning,” Deku says dryly. “Kacchan’s benefitting from how much I’ve gotten to practice on you.”

Something twists in Katsuki’s chest. He scowls, gaze lowering.

“Are you okay?” Kaminari asks. He shares a look with Deku. “We didn’t go too far, did we?”

“No, fuck off,” Katsuki mutters. “I’m fine.”

Because he is.

Because he’s not jealous.

Because that would be really fucking stupid.

His eyes snap back up and he glares across at Kaminari, then over to Deku. “Don’t be so fucking cocky, you just got lucky this time.”

Kaminari snorts. “Think you’re the one who got lucky, dude.”

“Fucking whatever,” Katsuki grouses. “It won’t be that easy next time. When are we doing this again?”

Both Deku and Kaminari grin.