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Kacchan has a big dick.
Of course Izuku knows, how could he not, they grew up together.
Kirishima has a big dick too. Now, it’s not as large and weighty as Kacchan’s, nobody really could be, but he was long and decently thick all the way down. He’s a dusky color too, and Izuku really, really wants to see whether the head got red when it was hard.
If you can’t tell, Izuku is kind of a cockslut. He just loves cocks, he does. He’s a pervert.
Honestly, he’s been on the internet since he was like, four, of course he’s a bit fucked up.
Dorm life has only increased Izuku’s deviancy (it’s not like Mineta’s, he’s not a fucking stalker thank you) so his fantasies have revolved around and centered on basically everyone in his class at some point. Always returning to Kacchan though, as is the norm. Kacchan and his big dick.
“So fucking big,” Izuku whispers into his pillow, two fingers awkwardly slipped into his ass and his hard cock pressing into his mattress. He’s in his room, he can do what he wants so long as he’s quiet. It’s so hard to get what he wants wants though, with his stupid arms and the way he needs to be filled. He doesn’t even have a dildo.
He bounces his hips and his eyes close, as he focuses. As he remembers.
Kirishima had been naked and wet from the showers when he saw him that morning. His cock was long, perhaps as long as Kacchan’s, but even. It was so pretty, Izuku had to hold himself upright so he didn’t just drop to his knees to suckle it right then and there at eight AM.
“Kir-Kirishima.” He bites his pillow, imagining really sharp teeth leaving marks in his ass cheeks, strong hands hold him open. "Eiji!"
He imagines Kirishima had simply walked up to him and shoved him down, bent him over right there and fucked him while classmates went in and out of the bathroom, walking by them, watching Izuku take that dick no problem.
Oh, what if Kacchan had come in too?
The mere thought of both those dicks in the same vicinity as a naked and willing Izuku makes him pop off, coming against his fingers and whining for it.
The nice thing about fantasies is that they never reject him. In real life, neither one of them would ever know.
At least not yet. Kirishima opens that can of worms in the locker room mere months away from graduation, the red-haired man flirting with Izuku so hard he gets all red and flustered and licks wetly over his plump, bitten mouth.
Katsuki watches from only a few meters away, temper steadily rising.
“I’ve seen you look, dude,” Kirishima coos, half in amusement and half hotly whispered, pink in his cheeks for being so daring, “It’s okay. It’s normal.” He’s angled just so, towel hung only barely on his hips, base of his cock peeking out at the top in a nest of stiff black hair.
“…big.” Izuku whispers back, likely involuntarily. Katsuki grinds his teeth.
“You like them big, Mido?” Kirishima’s voice drops to match, but he’s still a loud fucker.
Katsuki’s grip on his locker door threatens to dent the metal.
Kirishima leans into Deku, puts his lips next to a whirled ear and whispers something low and heated, and the bright flush to Izuku’s cheeks, the way his eyes lid and his mouth drops open makes it clear what the fucker was telling him.
Deku nods, agreeing, biting his lip when Kirishima – the asshole – palms over his ass. Kirishima knows Katsuki’s just been biding his time. Knows that ass belongs to him.
He’s ready to boil over, ready to blast right the fuck off and wipe Kirishima’s grin right off his fucking face. Ready to shove Izuku to his knees to get the cock that’s been waiting all these years. He was waiting for school to finish, can the nerd not see what Katsuki was doing here? Like hell were they tripping at the finish line. Mineta does something gross a few lockers down, which causes a scene, and Kaminari knocks into Katsuki. By the time Katsuki looks back both Kirishima and Izuku are missing.
Wrongness sits in his gut.
Fuck.
Someone’s going to fuck Izuku’s whorish little cockslut ass and it wasn’t Katsuki? Fuck no. Absolutely fucking not.
He abandons everything and rushes away, heading for the nerd’s room. He doesn’t even care that he gets some weird looks. They can fucking listen to him wreck Deku’s ass, listen to his screams as Katsuki fucks him apart. It would make it very clear who the hell that whore belonged to.
Katsuki. He belonged to Katsuki.
Duh.
Bursting into the room and slamming the door behind him, Katsuki glares with molten heat at the way Kirishima was urging Izuku onto his back, spreading those thick thighs and slipping his stupid fucking hands up Izuku’s shirt. He doesn’t even stop when Katsuki enters, just looks up at him and ignores Izuku’s sudden embarrassed squeaking, He's touching him deliberately, flicking over his nipple.
“You’re not fucking him.” Katsuki growls, low and dangerous.
“Hey man, I don’t mind if you join.” Kirishima grins with his pointy teeth, challenging him. “But Mido said he wanted me too, I can’t just take it back now.”
Izuku’s breathing has increased, his eyes dart from one young man to the other, both cornered and…excited.
“He’s a slut and a whore, you can’t listen to what he says he wants.” Katsuki argues back. “He’s mine.”
“You haven’t claimed him yet, though, bro.” Kirishima was acting so odd, prodding back at Katsuki and still touching Izuku, stripping his shirt off gently and pushing him flat to the bed. He’s putting weight on him now, and he’s heavy. Suddenly Izuku feels like a middle schooler again, quirkless and weak and like he couldn’t stop him if he tried. Neither of them seem to care that Izuku was here, that Izuku might have an opinion. They were gonna either fuck him or fight for it.
Izuku whines, heat strengthening.
Oh, so he likes that.
“He’s always wanted my cock,” Katsuki glares, treading closer, chin raised and eyes burning, “You’re a poor substitute.”
“Maybe you’re too late for it. And I’m big enough that he was drooling for it, aren’t I?” Kirishima shoots back, leaning down low enough to lick across Izuku’s cheek like a dog. It’s bold and wet and a little gross, but Izuku’s eyes roll back in his head and he whines again. “Hear him?”
“You fucking piece of shit, Deku, any cock does it for you, huh?” Katsuki snarls, stomping closer and digging rough fingers into green hair.
He’s crowded on both sides, two tall wide shouldered beasts putting their hands on him. Katsuki goes further, gripping his hair harshly and dragging his head over to press his face, blushing and all, against a half hard behemoth of a cock, trapped in his slacks.
“Kacchan—” Izuku breathes, dazed and drugged and unable to help his own reaction. Kirishima’s hand cups over his cock, trapped and leaking in his pants, and he’s being flexed against where he can feel a similarly large cock press against his hip. “Kiri…shima…”
“He wants it so bad.” Kirishima breathes, hips working against Izuku’s hip, watching with hot eyes as Katsuki forces the other’s face so harshly into his crotch he’s forced to breathe his cock’s scent. “Share him?”
Katsuki wordlessly growls, but Izuku was half gone already, his hands dreamily make their way to his hips, his waistband and tugging, nose digging in further by his own volition, mouth dropping open so his tongue can drool over the zipper.
“This time.” Katsuki decides, less ready to punch in Kirishima’s face, far more ready to fuck Izuku’s mouth until he cries and gags and passes out.
“There we go, Mido, do you like the sound of that? Instead of one big cock, you’ll get two!” Kirishima chirps, way to cheerfully. He bodily drags Izuku off the bed to his knees, then stands and looms right over him, so that both he and Katsuki were at his face, still dressed.
“Yeah,” Izuku says back, shakily but so fucking ready for this (was he dreaming? Not just Kirishima-kun, but Kacchan too? Both? Both. Both is good). “Yeah, okay.”
His hands latch onto waistbands and he ineffectually tries to undo both belts at once, one handed.
“Fucking useless.” Katsuki grunts, but then hisses when Izuku hauls them both so close his head is practically pressed between their crotches, eyes hooded and dazed. “Just good for fucking.”
“But so fucking good, am I right?” Kirishima jeers, reaching down to help the green haired boy with his belt, taking the time to yank off his coat and shirt too, so he stood there in his boxers, stepping out of his pants. With the clear access to him, Izuku abandons Katsuki to face plant against the hard line of Kirishima’s cock, mouth open and wetting the fabric of his underwear, mouthing it up and down.
“Fuck, fuck—” Katsuki rushes to catch up, even as Kirishima lets his head fall back and slips his fingers into green curls.
“God yeah, Mido, suck it like that.” He humps his hips forward and is rewarded with a weak, overwhelmed whimper. Hands tug at his boxers, and he lets them, his cock whirling out to smack over Izuku’s face.
Izuku moans at that, tongue dropping open to lick along the underside of Kirishima’s cock.
“Holy shit.’ He whispers, stunned and reeling from the sensation. From Izuku’s desperation.
“So big.” Izuku mutters to himself. “I knew the head would be red, I knew it.” He licks over it, then draws back to look. He’s distracted from diving back in when a larger cock, weightier, thicker around the middle of the shaft, presses to his cheek.
Katsuki is stripped finally, and he’s so fucking smug that the instant Izuku caught the scent of his cock, he abandons Kirishima.
But then Izuku has his hands on him, measuring the size, weighing it, drawing back the foreskin to kiss the head like it was a mouth, open and with tongue and everything.
“Shit.” Katsuki grits his teeth, wavering on his feet but using his grip on green hair to steady himself.
Izuku groans again, whining out, “Kacchan’s dick.”
Alone, Kirishima pants and pumps at his own cock, devouring the way Izuku was sitting, knelt and thighs splayed apart, how he suckled from Katsuki’s cock like it was nourishing him.
“Holy hell, he loves dick.” Kirishima says, almost surprised.
Katsuki pulps his hips forward, urging Izuku to take more, and grits his teeth. “What did I fucking say. Cockslut.”
Kirishima grunts, then takes one of Izuku’s hands away from where it was cradling Katsuki’s balls, putting it on his cock and helping him pump. It splits Izuku’s focus, but then his head starts to bob in a gorgeous sensual motion, and Katsuki doesn’t fucking care anymore.
He fucks forward too hard, hitting throat, causing Izuku to cough and draw himself off.
“K-Kacchan, so huge, so fucking big, what a big cock,” Izuku was muttering then, smearing the spit-wet cock along his lips, over his fucking face.
He switches to Kirishima’s cock when it pulses in his hand, and he sucks it down greedily too, like a popsicle. He slurps, and it’s so fucking loud and dirty it sends shivers down their spines. If Izuku's mouth wasn't filled, he'd be smiling, the way his cheeks pull it feels even better.
Katsuki shoves forward, and Izuku is drawing them together, shoulder to shoulder, messily widening his mouth around both their heads, licking between them and bumping them into each other. Katsuki doesn’t even care that his cock is touching Kirishima’s, Izuku was looking up at them like they were gods.
Kirishima’s fingers knock into his within green curls and together they take turns fucking one cock down Izuku’s throat, drawing off just to fuck the other down. They take it slow to start, but then Kirishima gets impatient. He fucks in and out a few times on his turn, making Izuku’s mouth and throat make that ‘glurgheck’ noise that was so fucking hot, Katsuki instantly wants his turn. He pulls Izuku off and onto his, fucking a few times himself and his eyes threaten to roll back, because it’s so good.
“You good, Mido?" Kirishima asks, puffing, eyes nearly black with want. He strips at his cock over Izuku’s busy mouth, spittle and pre decorating over his cheeks, lashes, and forehead. Katsuki’s not going to tell him that that looks awesome.
“Yesh,” Izuku says between cocks, breathing heavily and pumping at both with one hand each. His face is a mess, covered in saliva and pre, and his lips were bruised a bright red. “Yesh, pleash, mor—” He’s cut off by a cock going so far in that his throat bulges.
Honestly, at this point, it’s like they’re one being with two cocks because it’s almost like they can feel how good it is when either cock is inside.
Izuku moans, shuffling on his likely aching knees.
“You want more, Deku?” Katsuki whispers, and green eyes search to find his. He cups over Izuku’s face gently, thumb pressing into his cheek to feel the cock inside moving in and out. Is it his cock, or Kirishima’s? Who cares, Deku was nodding, whining, cheeks hollowing when he sucks, licking up excess saliva and over the tips like he can force his tongue inside.
“I’m gonna fuck you full, and Kiri’s gonna fuck your throat, how does that sound?”
Izuku immediately shivers, urging himself up and on his cock in his eagerness. His groan vibrates around Katsuki's head and he shivers. He gasps in air over it, switching again.
“Hey, what if I wanted to fuck him?” Kirishima asks, only half joking. Raising an eyebrow, Katsuki glances down to where Kirishima’s cock was fully seated in Izuku’s mouth, and one of Kirishima’s fingers was pushing inside at the corner of his lip just to stuff him a bit more.
“Point taken.” Kirishima sniffs, drawing back to then urge Izuku to stand. He does, shakily, clutching onto them both as they strip him in record time, ignoring his whimpers and whines. They grope, peeling his clothes off him, touching him like he was theirs, like he had no fucking choice and Izuku gasps with it, shuddering.
“You guys…” he starts, but his words are derailed when they bite him, one on each shoulder, sucking hickies and competing to mark him the most. He clutches at red and blond hair. “Guys you’re…” He’s trying to find words, trying to find his brain again after getting so deep into that space where cock was all he wanted, where the cocks in front of him were just for him.
“We’re what?” Kirishima asks, licking up a strong neck to kiss and nibble at his cheek and jaw. Izuku moans, while Katsuki palms at his ass cheeks and pulls them apart, dipping inside to touch and claim and conquer like he always does.
“Yeah, Deku, we’re what? Giving you what you always wanted?” Katsuki grunts, drawing back and then diving forward, kissing Izuku harshly, clutching the back of his head, taking him over.
Izuku moans into his mouth, scrambling at both chests and licking at the other’s tongue.
“Bro, share.” Kirishima says, elbowing Katsuki off and sealing his own mouth over Izuku’s before he can even breathe.
Katsuki swears at him, but then Izuku feels his cock pressing, needy, at his thigh, as Katsuki walks them all backwards. Izuku is shoved, then, forced onto the bed with his legs splayed.
“You guys are,” Izuku pants, sucking in air they weren’t letting him keep, “you’re so much. Why…” He’s crowded again, as Kirishima lies on his side all along him and touches him, greedily sliding his hands up his thighs, over his straining cock, up his sides and pinching his nipples.
Katsuki took a moment to search his bedside and found his half-used bottle of lube, before crawling his way between Izuku’s thighs and shoving them open around himself.
“Why what? Why are we doing this?” Kirishima answers him conversationally, even as Katsuki drenches his fingers in lube and hauls Izuku’s leg up and open, spreading him. “It’s ‘cause I’ve wanted to fuck you for a few years now, and Katsuki has wanted to be balls deep in you since he was old enough to figure out how to use his dick.” He grins, his happy face incongruent with the way his hand was caressing at Izuku’s throat, almost threatening to pinch and shut off his airway.
He didn’t, but Kirishima was a lot more forceful that Izuku would ever had imagined.
“Shut the fuck up shitty-hair.” Katsuki grunts, wiping his fingers up and down over Izuku’s hole, touching like he wasn’t even nervous, like it was his hole. Like he owned it.
God, it was hot.
Kirishima looms closer and nips at Izuku’s ear, then his neck, sharp, sharp teeth blooming bright painful spots.
“You do love it, don’t you? How we’re using you.” Kirishima says lowly, hotly. Katsuki works one finger in, gentle. It’s almost nothing, since Izuku had opened himself up last night, but it was Kacchan’s finger, and his cock hung so heavy there between his thighs because it couldn’t even stand itself up, it was too big. “How big we are compared to you. I listen to you sometimes.”
“W-what?”
“You mumble when you masturbate, Mido-baby,” Kirishima says and the pet name makes Izuku jerk. Then he jerks again because Katsuki crooks his finger harshly, glaring up at them from between quivering thighs. One hand busy, Katsuki’s other hand was clamped on Izuku’s leg, curled around to hold him still. Despite being the one inside of Izuku right now, somehow the man looked jealous.
“Oh, Mido,” Kirishima laughs, wrapping his hand tightly around Izuku’s cock. It makes him cry out, and Katsuki inserts another finger. “I’ve stood at your door for like, three weeks listening to you make yourself cry. Were you using your fingers? You whine for Kacchan almost every time.”
Katsuki groans, hips punching forward at the words.
“But I heard you a few days ago,” Kirishima says, brushing his lips over Izuku’s, getting him to look only at his red eyes, to ignore the work Katsuki was doing. “You called my name.”
Katsuki snarls, and then Izuku was being pressed into his own bed, as the blond rears up over him and growls at Kirishima.
Kirishima merely grins at him, savage and mean, and also rears up, kneeling, bringing his long, thick cock nearer to Izuku’s face, heavy balls pressing to his forehead as the cock is laid over his face. It’s again so claiming, that Izuku feels breathless with it, with the sweaty, tacky scent.
“Shut your fucking mouth, shitty hair.” Katsuki growls, three fingers in and punishing with them, working Izuku over so well his body was starting to misfire, arms and legs jerking, mouth dropping open to moan. It only lets his tongue come into contact with Kirishima’s cock. “I should have been the one fucking him, shoulda fucked him in middle school, since I got hard the first time. Shoulda turned you into my own fucking bitch, huh, Deku? Fuck you anywhere, everywhere—”
Katsuki’s still talking, even as he pulls his fingers away, opens the lube and wets his cock, getting ready to fuck Izuku, to take his virginity, without even asking.
It’s hot, and Izuku is starting to think he’s a little more fucked up then he ever realized. But then, that’s obvious, because he’s straining to lick at Kirishima, mind lost in Katsuki’s words and the images he’s painting as the other just keeps going.
“—bend you over in class to fuck you in lecture, make you scream so loud nobody can hear Aizawa at all, leave you open and wet and wrecked on my desk, write it all over your ass an open fucking hole, fucking cum toilet. You’d fucking live for that. Shoulda done it, shoulda fucked you the first time I ever thought about it, just taken you cause you fucking love to be taken, don’t you, Deku. Taken like a fucking slut, paid for it like a whore. By me. Loving it because you can’t fucking live without this cock.” He’s pressing his cockhead to Izuku’s hole, kissing it wetly, fingers gripping so hard the tips were likely to leave bruises.
Izuku’s so far away from making words right now, all he can do is whine loud and watery, hips twitching in Katsuki’s grip, trying to get that cock inside. Katsuki straightens his back and then starts pressing in, stretching Izuku open over his cock and swearing through clenched teeth.
“We can still do that, I think.” Kirishima says, breaking the breathless atmosphere. He also presses his cockhead into Izuku’s mouth, turning his head in his hands so he can feed it to him and watch how his cheek bulges. “He’s always so stretched by his fingers, we could just bend him over and fuck him, like, whenever.”
Izuku was destroyed, as two cocks work into his body like he’s not even breathing, like he’s just a doll.
His cock is so hard, and his ass clamps down over Katsuki’s length.
He moans around Kirishima, tears squeezing out of his eyes as he shivers, frantically trying to grab hold of someone, Katsuki’s forearm, and Kirishima’s thigh.
“He likes the idea!” Kirishima cheers, drawing his hips back and then pressing again, starting up the same kind of rocking motion that Katsuki was doing.
“Course he does,” Katsuki grunts, smacking one hand against the ass he held open. “He’s wanted me to fuck him for years.” His knees slip apart some and he hits deeper.
Izuku arches, both because of the slap and because the angle was now fucking immaculate, dragging over his prostate with that big hefty weight and like it was fucking up into his intestines. So huge. It was almost painful, but the pain and the pleasure where criss-crossing right now in Izuku’s body. He moans around Kirishima and sucks hard, working his neck to get an angle that lets him fuck in further.
“Fuck,” Kirishima sighs, head falling back and fingers twitching in green hair.
“Fuck,” Katsuki groans, clutching harder to thick thighs and working his hips, sweating so much that it drips over Izuku, painting him with sweetness.
Fuck. Izuku thinks, brain going fuzzy and weightless around the edges.
Kirishima fists his hands in green hair and works him, fucking in just a bit too hard so that Izuku gags, and coughs. His coughing clenches his body around Katsuki, who snarls, fucking harder as well, and Izuku’s about to fucking pass out from too much dick when Kirishima swears, slapping a palm to Izuku’s wall, coming into his mouth in a huge wave.
Sputtering, Izuku half drowns before Kirishima pulls back, then he’s licking, desperate for more, swallowing everything.
He’s heaving in air, body rocking against the force of Katsuki’s thrusts, crying out with his wrecked voice as that cock took over his senses. God, god, he was so close.
“K-kacchan, Eiji—Eijirou,” He moans, hands scrambling, unable to hold onto anything. His cock slapped against his stomach as Katsuki forces his hips entirely off the bed, ramming into him with voracious need.
“Deku, you gonna come, you gonna come on this cock?” Katsuki pants. “If you don’t come before I do, you don’t get to, understand, slut? Fucking whore should be thankful we give him so much fucking dick, don’t be ungrateful, fucking bitch, fucking come on that—yes!” Izuku, drowning in his words and the overwhelming feeling in his gut, barely gets the skim of a hand over his red cock, maybe Kirishima’s since Katsuki hadn’t let his ass go yet, and comes like lightning, entire body flailing and jerking and white overtaking his vision, white noise overtaking his ears.
He’s not…anywhere for a long moment, he’s drifting in his body’s pleasure and likely has forgotten to breathe. Katsuki comes in that time, filling him, baring his teeth with it.
Then Izuku’s drifting back, feeling like he weighed a ton, sunk into his mattress and unable to move, leaking from both ends and covered in a mess of fluids and bruises, and bite marks.
“Slut.” Katsuki growls into his ear. He’s being kissed, gently, with sharp teeth not so gently breaking skin on his bottom lip.
Izuku’s so wrecked right now, the painful feeling makes him moan and his tired little cock to twitch.
“Whore.” Katsuki sighs, almost affectionate. He’s careful as he wipes up the blood from his split lip, kissing him with sweet presses that Izuku was already addicted to.
He couldn’t move, and his entire body felt like a great big sore, his ass and guts were on fire, cramping, and his hole felt so wet with Katsuki leaking from him he really did feel like a whore. But everything in the world felt so right, so good right now, he felt so good. Both cocks had come in him.
“Hmmm,” he hums back, being kissed by one then the other, pet gently by four large, warm hands.
Everything was perfect.
“Next time, I get his ass.” Kirishima.
“Only if I can make him gag.” Katsuki.
Green eyes open to two terrifying smiles, one mean, the other cheerful. He absently wonders if someone can die from fucking too much.