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It’s always been wrong, the way Izuku looks at Katsuki.
It occurred to him once many years ago, when Kacchan was still so, so young, that most people don’t feel the way Izuku feels when they look at their brothers. They don’t notice the way their siblings' bodies change as they grow up. They don’t see them playing in the snow and think I wonder how warm his skin is underneath those layers. They don’t hope that, in another universe, they wouldn’t have been born to the same family.
Izuku is a sick, sick man. He’s known it for a long time. He’s a hero, for God’s sake. Been at the top of the rankings for the better part of a decade. And still, no matter what he does, Kacchan is all he can ever think about.
Izuku avoids going home as much as possible for that very reason. He’s never been good at impulse control, always running headlong into the first situation that calls his attention, always saying the things he should keep to himself. Izuku knows his limits, and also knows when his limits don’t exist. Unfortunately for him, Kacchan is exactly where those limits begin and end.
His mom asked him to visit for the weekend. That’s what prompted Izuku’s latest freak out, because he knows Kacchan will be there, and Izuku is scared. Scared of himself. Of the things he will think of when he sees his brother again, of the things he might do.
Izuku shakes his head as if to clear the thought from his mind. He rearranges the strap of his bag on his shoulder, swaying with the gentle movement of the train. He can do this. One weekend, two days, forty-eight hours. That’s not long at all.
⇍⇍⇍⇏⇏⇏
Kacchan is wearing shorts.
That is the first thing Izuku notices when he walks through the door, finding his brother laid out in the living room, toned legs stretched out over the length of the couch as he watches TV. The shorts just barely reach Kacchan’s thighs, and Izuku swallows past the lump in his throat when he finally manages to lift his gaze and finds red eyes already trained on him.
“What’re you doin’ here?” Is the first thing out of Katsuki’s mouth, and Izuku can’t help the huff of a laugh that escapes him. He was asking himself the same question the whole way here.
“Mom said she wanted to see me. And it’s been a while so… I figured I’d indulge her.” He answers, and Kacchan grunts in acknowledgement.
“They’re all out right now. Went to pick up dinner.” Kacchan says, turning on his side so he’s facing the TV, back to Izuku. The movement makes his shorts ride up a little, exposing the tiniest peek of his ass from beneath the fabric. Izuku’s heart stutters at the sight, and he’s quick to turn away to head to his room.
“Gonna put my stuff up.” He mumbles quickly, heading for the stairs, not even waiting for a response. As soon as he’s in the privacy of his room, Izuku slumps against the closed door, bag thumping to the floor as he stares down at the just barely noticeable bulge in his pants.
Goddamnit.
⇍⇍⇍⇏⇏⇏
“So how’s work been?” Mom asks him at dinner, and Izuku finishes his bite of katsudon before replying.
“Good, busy. Villains never take a break, you know?” Izuku says, and his mom hums in agreement.
“It’s good that you’re home though, brat. It’s been what, six months since you’ve spent some time here? You’re gonna drive us crazy, only getting to see you over lunch.” Auntie Mitsuki says, narrowing her eyes before pointing an accusing finger at him, “This better not be the last time you come home for months again.” Dad sends him a sympathetic smile at the reprimand, and Izuku swallows before shaking his head.
Izuku chuckles awkwardly, cheeks heating at being called out, “N-No, of course not, Auntie.”
Katsuki snorting under his breath from across the table catches Izuku’s attention, and Izuku clears his throat.
“What about you, huh?” He nods at Katsuki. “UA entrance exams are gonna be here before you know it, a year goes by faster than you think. Are you keeping up with training?” Katsuki rolls his eyes with a scoff, but a smile plays on his lips when he responds.
“Who the hell do you think I am? Obviously. None of those extras will even come close to matching me.”
Izuku smiles fondly, heart fluttering at the determined sparkle in Kacchan’s eye. He’s always been so driven, so focused, and it never ceases to amaze Izuku.
“Mhm. Kacchan is the best, after all.” Izuku says, not even realizing the words were forming on his tongue until they were already out in the open. Kacchan blinks at him, grumbling under his breath as he looks back down at his food. Something in Izuku’s stomach flips when he sees the pink tips of Kacchan’s ears peeking out from his hair, fingers twitching around his chopsticks with the urge to trace a finger around the shell of it, feel the heat of Kacchan’s blush beneath the pads if his fingers.
Izuku clenches his jaw, forcing himself to focus back on his food. He can’t do this at the fucking dinner table, God what is wrong with him? It’s bad enough that he’s even like this in the first place, but in front of his parents? He really needs to get a hold of himself.
Something nudging against his leg under the table distracts him from his self-deprecating thoughts, and the sound of his parents talking amongst themselves falls away into background noise as he feels a more intentional nudge against his shin. He looks up at Katsuki but the blonde is focused on his food, not looking up even as Izuku feels a foot trail up his shin, nearly reaching his knee before retracing its path back down again. His cock twitches traitorously in his pants, the metal chopsticks in his hand creaking dangerously in his grip.
The foot falls away just as quickly as it had come, leaving Izuku’s mind foggy. He hadn’t imagined that, did he? No, it was probably just an accident… yeah.
Just a slip up.
Dinner goes on without incident, and soon enough their parents are heading to bed, leaving Izuku and Katsuki alone in the kitchen to clean up. Izuku washes while Katsuki dries, silently working in tandem as if they’ve always lived like this. It makes something ache deep in Izuku’s chest, the thing he always tries to ignore beginning to creep up on him. Something that whispers, Wouldn’t it be nice? If this could be yours? If he could be yours?
Izuku hands the last dish over to Katsuki before drying his hands on a paper towel, leaning back on the counter with a heavy sigh. The soft clinking of dishes continues for a moment as Katsuki dries the last dishes before silence falls over them both. Izuku watches out of the corner of his eye as Katsuki seems to work himself up to something before he turns to Izuku.
“I’m going out to the pool. You should come with.”
Izuku blinks, barking out a startled laugh. “Kacchan, it’s late. I don’t think-”
Kacchan groans loudly, cutting off Izuku’s protests, “Come on. When was the last time you actually had some fun?” Izuku’s mouth opens and closes, unable to come up with anything to say in retort. Katsuki rolls his eyes, “Yeah, that’s what I thought. You’re gonna burn yourself out if you never take a break, dumbass.” The blonde grabs his arm before he can say anything else, pulling him through the sliding glass doors of their backyard until they reach the pool.
Izuku laughs at Katsuki’s insistent attitude, “Kacchan, I don’t even have a swimsuit-” The laughter dies on his lips when Katsuki pulls his shirt off, quickly pushing his shorts down until he stands at the edge of the pool in nothing but a pair of plain white panties. Izuku only barely manages to suppress a wanting whimper when he catches sight of a little pink bow on the front, standing out stark against Katsuki’s smooth skin.
“Well? Come on, it’s not even that cold.” Kacchan says, wading into the pool until he’s submerged up to his chest. Izuku swallows thickly, debating the merits of turning around and heading right back inside. Kacchan is looking at him expectantly though, the light refracting through the pool lighting up his face, and Izuku bites his lip before sighing, hoping the half chub he’s sporting isn’t visible in the low light as he strips himself down to his boxers and follows after Katsuki.
The water is cool as Izuku steps into the pool, making his way in until he’s standing in front of Kacchan, arms gliding through the water to steady himself. Kacchan laughs, and Izuku only has a moment to blink in confusion before a wave of water is crashing down on him, leaving him choking and sputtering.
“Oh, I see.” He laughs, shaking out his hair, “You’re gonna regret that, Kacchan.” Red eyes widen, and Izuku’s on him before he can even attempt to swim away. Kacchan’s startled laughter rings through the night as Izuku pulls him close before drenching him. They wrestle each other like that for a while, pulling and tugging at each other’s arms, taking every chance to grapple the other into the water.
Izuku’s arms find their way around Katsuki’s slim waist without him even fully realizing, Kacchan locking his ankles around Izuku’s waist to keep himself up as their screeching laughter and frantic splashing slows into soft giggles and gentle waves.
Kacchan’s so close, Izuku realizes with a jolt. Their faces are mere inches apart, and Kacchan’s arms tightening around Izuku’s shoulders only serves to pull them even closer.
Their chests slide against each other with every heavy breath, the peak of Kacchan’s nipples pressing firmly into Izuku’s skin. Izuku can feel Kacchan’s every exhale fan across his face, leaving his damp skin feeling warm and tingly. Kacchan’s eyes dart down to his lips, and Izuku’s do the same, mouth salivating as Kacchan bites his lip.
Kacchan’s nose nudges against him, and something inside Izuku quivers before it cracks, and Izuku pushes that tiniest bit closer to press his lips against Katsuki’s. He’s so soft, mouth warm and easy as he moves with Izuku like it’s second nature to him. The wet slide of their lips feels deafeningly loud, only broken up by the gentle sound of water lapping against their heated skin. Kacchan moans softly, tugging Izuku closer by the wet curls at the nape of his neck.
Kacchan sighs as Izuku’s mouth trails down his jaw to his neck, sucking pink marks into the skin. His pulse jumps underneath Izuku’s mouth, stuttering when Izuku trails his tongue along it before biting down softly.
“Ah, Izuku…” Katsuki moans, and that finally manages to strike through the haze Izuku had fallen into, sending him crashing with the realization of what he’s just done. Izuku stumbles, letting Kacchan go with a curse, who splashes with the sudden movement before managing to straighten himself onto his feet.
“What… why’d you stop?” Kacchan asks hazily, and Izuku can’t even fucking look at him. God, what is wrong with him?! He had one goal this weekend. Don’t fuck your brother. And somehow he’s already halfway to breaking it.
“Fuck… fuck!” Izuku yells, dragging a rough hand through his hair as he turns his back to Katsuki. Izuku’s eyes burn with the threat of tears, guilt and shame consuming him.
“I’m sorry, Kacchan.” He croaks, shamefully still faced away from the younger boy. He can't bear to see the look on his face. “I-I have no excuses. I’m so sorry.” Izuku says, making his way out of the pool. He snatches his clothes up and heads inside, scrambling up the stairs as fast as he can, not looking back for even a second.
He locks himself into his bathroom, turning the shower as high as it can go, hoping the burn will help wash away the crushing shame of what he’s just done. Kacchan’s so young. Still learning, still has so much left to do in this world, and Izuku is just trampling all over it. Kacchan should be dating people his own age, and someone that isn’t his fucking brother for God’s sake.
Izuku’s eyes prickle with tears, angrily thumping his forehead against the shower wall when he sees that his boner has not gone down in the slightest despite the heat. Izuku braces one arm against the wall, gritting his teeth as he takes himself in hand, stroking himself quickly and clinically. He’s not thinking of Kacchan. Not of his smooth skin and soft lips and pretty moans. Not the way he’d sounded so fucked out just from a bit of kissing, not the way Izuku had felt the subtle twitch of his hips into Izuku’s embrace with every wet kiss, as if searching for friction to satisfy himself.
Izuku cums down the drain with a bitten off groan, stroking himself until his toes begin to tingle, vision blurring with a sudden wave of dizziness. Izuku shuts the shower off after a moment, mechanically going through the motions of drying himself and getting dressed before he climbs into bed, staring blankly up at the ceiling.
Izuku exhales heavily, pressing the heels of his palms into his eyes until stars dance across the back of his eyelids. He could just leave in the morning, sneak out before the sun comes up. His parents will be mad, sure, but he can always make it up to them. He can’t face Kacchan again though. He can’t. Izuku’s done something awful, truly morally unforgivable, and he shouldn’t subject Kacchan to being around him.
Izuku grapples for his phone on the nightstand, setting an alarm for 5AM. Nobody will be awake then, and Izuku can just quietly get ready and slip out without causing any kind of fuss. Yeah, that’s smart. Izuku sets his phone back down, blowing out a breath as he settles back down.
This is the right choice.
⇍⇍⇍⇏⇏⇏
A persistent buzzing wakes Izuku up, and he grumbles as he fumbles to press his phone to silence the noise.
Izuku blinks, eyes adjusting to the minimal light filtering through his curtains, rubbing his eyes when he spots Kacchan sitting at the foot of his bed looking at him.
Wait-
Izuku jolts, nearly tumbling off his bed with how fast he sits up, heart pounding in his chest. “Kacchan! Jesus, what- why are you in here? Why are you awake?” Izuku gasps, pressing a scarred hand to his chest as if that could help slow the thundering of his heart. Kacchan’s eyes seem to almost glow in the low morning light as he crawls forward on the bed, leaning in further when Izuku unconsciously leans away.
“I wanna have sex.” He states, as matter of factly as if he were talking about the weather. Izuku blinks. It is early and he did just wake up, so surely he must have misheard.
“Huh?”
Kacchan clenches his jaw, leaning even further into Izuku’s space, “I want you to have sex with me. Today. Right now, preferably.” Izuku just stares, brain moving sluggishly.
“It’s 5AM.” Is all that he manages to say, then he shakes his head, brain finally booting up as he processes Katsuki’s words, “Wait, no, what?! Kacchan, no. What the hell?!”
Katsuki scoffs, leaning back to cross his arms over his chest, “Oh, so we can make out but not have sex?” Guilt claws its way up Izuku’s throat, and he sighs.
“No, fuck, that never should’ve happened. It was a mistake. My mistake. I should’ve known better, I do know better. I’m sorry, Kacchan. I really am.” Izuku says, rubbing his eyes and swiping the hair away from his face before looking up at the blonde. Katsuki’s face is red, his jaw clenched in anger.
“You are such an asshole. You know that?” The insult is expected, of course, but it still stings. Kacchan’s eyes are bright with fury, shining with the threat of angry tears, “You think I’m not capable of making my own choices? Of thinking for myself?” The tremble in his voice makes Izuku’s heart feel like it’s going to break apart, and he’s quick to shake his head.
“No, no, Kacchan that’s not it.” He says, not thinking twice as he reaches out to swipe away the tears that slip down Kacchan’s cheek, “This is on me, not you. I’m the adult here, I’m your older brother. I should’ve been the one putting up lines and making sure they’re never crossed. I’m sorry that I failed, and I’m sorry that I hurt you in the process.” Kacchan sucks on his bottom lip, nuzzling into Izuku’s hand that still cups his cheek.
“I’m not a kid.”
“Yes, you are-”
“No, I’m not!” Kacchan huffs, shoving Izuku’s hand away from his face, and Izuku blinks in shock at the outburst, “You think I just woke up one day and decided to kiss you?! I know the way you look at me, Deku. I’ve known it for years. And I don’t care, I want it, why is it bad if I want you too?!”
Izuku is stunned into silence, the weight of his guilt suffocating. He’s fucked up even worse than he thought, unknowingly molding Kacchan to be his from the beginning, and Izuku feels sick at the way his gut clenches at the thought. Kacchan has been his all this time, and he didn’t even realize.
“Kacchan, this isn't right. We can’t.” Izuku says, pleads almost, but the words don’t sound convincing even to his own ears. Katsuki sniffles, mouth setting into a determined line as he drags his hands across his cheeks to dry his tears.
“Fine.”
Izuku breathes a sigh of relief when Katsuki stands from his bed, hoping this will be the end of it, but he startles once more when Katsuki begins stripping off his clothes, leaving them in a rumpled pile on the floor.
“What’re you doing?!” Izuku hisses, mindful of the fact that it’s still early in the morning and their parents are sleeping downstairs.
“Proving you want me.” Kacchan says simply, tugging Izuku’s shirt off over his head, using Izuku’s confusion to his advantage to strip him completely naked before he can even process what’s happening.
“Wait, Kacchan wait, wait-!”
Izuku’s protests are useless as Kacchan uses a surprising amount of strength to push him flat to the bed, slinging a leg over Izuku’s hip until he’s straddling his lap. The warm and fuzzy press of Kacchan’s cunt over Izuku’s navel is maddening, and Izuku stares bewildered as Katsuki’s hands press into the sheets on either side of his head, leaning in close enough for Izuku to smell the mint of his toothpaste.
Kacchan just stares at him for a long moment before he smirks, a self-satisfied uptick on the side of his perfect pink mouth, “Did you forget you have a quirk now? And that I’m not even half your size? You don’t need to be here, Deku. You want to be here.”
Izuku swallows, Katsuki’s eyes tracking the bobbing of his Adam’s apple, “Get off me, Kacchan.” He says slowly. Katsuki just stares at him for a moment longer, hands shifting in the sheets until Izuku feels thin fingers tangle into his messy bedhead.
“Mmh, no. I think I like it here, actually.” Katsuki says, a cheeky grin lifting his cheeks
Izuku grits his teeth, patience hanging on by a thread, “I mean it. Get up and put your clothes back on.”
Katsuki’s fingers tighten in Izuku’s hair until it stings, leaning in close enough for their lips to brush with every word. “Or what?” He whispers lowly, dragging the tip of his tongue across Izuku’s lips.
God, Izuku only has so much self control, okay?
Kacchan lets out a satisfied laugh when Izuku’s arms wrap around his waist, twisting until Kacchan’s back thumps against the mattress.
Izuku swallows up that laugh, tongue pressing into every crevice of Kacchan’s mouth, tasting every bit of him. Kacchan’s still giggling against him, giddy and excited, and Izuku can’t help the smile that he presses into Kacchan’s mouth.
“I knew it.” Kacchan gasps when they part, sucking on his lips as if to savor the taste of Izuku, “I knew you wanted me too much to say no.”
Izuku rolls his eyes, leaning down to press his lips to Kacchan’s neck, sucking over those pink marks he’d left the night before to turn them into pretty shades of red and purple. Katsuki’s breath hitches, thighs clenching around Izuku’s muscular waist, “Fuck, yes, like that.” He whines, and Izuku’s cock twitches violently at the sound, a sticky line of precum dripping down to stain his sheets.
Izuku pulls away to press his forehead to Kacchan’s chest, sucking in a deep breath to try and steady himself. “Fuck, you’re so- God, you’re perfect. You know that?” Izuku lifts his head, looking into Katsuki’s eyes to ensure the blonde knows he means every word.
Katsuki just smiles at him, twirling a strand of Izuku’s hair around his finger, “I know that, big brother.”
Izuku’s brain short circuits for a second, leaving him gaping wordlessly. Kacchan never calls him that and it makes a shameful pit form in his stomach, but even so, Izuku can’t deny that his cock is as hard as ever.
“Fuck, you’re nasty.” Kacchan laughs, tugging him up to kiss the stupid look off his face. Izuku’s hands roam over Kacchan’s smooth skin as they kiss, thumbing over his nipples briefly and taking note of the sharp inhale Kacchan takes at the feeling. Scarred hands trail across Katsuki’s stomach, fingers feeling the soft downy of Kacchan’s blonde pubes before they feel the place where warmth radiates out from him like an inferno.
Kacchan tilts his head back with a soft moan as Izuku’s fingers slip through his folds, gathering his slick before he returns up to pay special attention to Kacchan’s chubby clit, already swollen and pulsing with arousal.
Izuku rubs two fingers over Kacchan’s clit, moving in smooth circles and building up a steady pace. Kacchan moans beneath him, stifling his noise with his elbow when he grows too loud for the time it is right now. Izuku wants to hear him, hear it all so badly, but he knows they’re not in the place for that at the moment, so he settles for watching the way Kacchan scrunches his eyebrows in pleasure. Eyes rolling open to stare unseeingly at nothing before they squeeze shut again.
The slick between Kacchan’s legs is thick and hot, and Izuku’s mouth waters at how much pours out of the blonde. He’s moving down Katsuki’s body before he even realizes it, tongue flicking out to swipe against Katsuki’s clit, sending him jolting up the bed, thighs clamping around Izuku’s head.
“Oh, oh, Izuku.” Katsuki moans, low and long, both hands tangling into Izuku’s hair. Izuku sucks on Kacchan’s chubby clit, using his already slick soaked hand to rub at Kacchan’s entrance before slipping in two fingers easily.
“Ah, wait, no no no I’m gonna cum, stop, stop-!” Kacchan cries out with a sob, but it's already too late, Kacchan’s legs kick out as his orgasm overtakes him, the bed shaking underneath him with how much he quivers from the overwhelming pleasure. Izuku licks him through it, gently rubbing his fingers inside Kacchan to help him ride out his high.
“Oh god, fuck.” Kacchan gasps as he begins to come down, legs twitching with the last of his orgasm. Izuku slips his fingers out and sits up, shoving the digits in his mouth and sucking off every bit of slick he can get.
Kacchan’s lashes flutter as he catches sight of Izuku stroking himself to the image of him spread out below him, legs falling open wider to give Izuku even more of a show.
“You’re gorgeous.” Izuku grunts, squeezing himself from base to tip, using his precum to slick the way. Kacchan bites his lip to hold back a smile, trailing his hands down his body until he can spread himself open, pussy red and wet and wanting.
“I know.” He smirks, and Izuku can’t hold himself back anymore, crushing Katsuki against the bed as he guides his cock between those slippery folds until he catches, sliding in without even a hint of resistance.
“Oh my god, oh my god, oh my god-” Kacchan says under his breath, blunt nails digging harsh red lines into Izuku’s shoulders. Izuku can already tell he’s not going to be able to keep himself quiet, so he does himself a favor and clamps a hand over Katsuki’s mouth. Izuku keeps his thrusts pointed and short, grinding in deep where he knows it’ll feel good.
Katsuki lets out these high pitched moans from deep in his throat with every thrust, eyes rolling into the back of his head as he jolts with the force of Izuku’s thrusts. The sound of them drives Izuku fucking crazy, and he buries his head into the side of Kacchan’s neck to muffle his own grunts and groans, nibbling at the shell of Kacchan’s bright red ear.
“You’re so fucking wet, baby. Soaking my sheets, making a fucking mess. You love it, yeah? Feels good, huh?” Izuku pants into Katsuki’s ear, the heat of their bodies suffocating. Kacchan continues to whine and cry under him, tears and drool soaking Izuku’s hand.
Izuku can’t get enough of how sweet Kacchan is underneath him, taking it so well and crying for more. He’s so pretty, with his hair spread out over the sheets, red cheeks shiny with tears. Izuku won’t last like this, can’t possibly with his baby brother looking so amazing for him. Izuku braces on his elbow and uses his free hand to slip between their bodies, rubbing at Katsuki’s clit to help push him over that edge.
“Come on Kacchan, cum for me baby. You’re doing so good, so beautiful-” Kacchan squeals suddenly, hands a red hot brand on Izuku’s back as he cums for the second time, legs kicking and thrashing as a rush of fluid sprays between them. Izuku realizes with a harsh clench in his gut that Kacchan just squirted all over the both of them, probably for the first time in his life, and just that knowledge is enough to send him into his orgasm right on Kacchan’s heels. Izuku’s hips push and push and push and he cums deep inside, groaning loud and guttural as he swirls his cock through the absolute mess he’s made of Kacchan’s pretty cunt.
Izuku’s hand slips away from Kacchan’s mouth, who sucks in a deep breath, panting heavily as they both catch their breath.
Izuku pulls out as gently as he can, collapsing on the bed next to Kacchan in a heap of sweaty limbs.
Kacchan begins to giggle after a while, at first just silent shakes of his shoulders eventually turning into a full on laughing fit. Izuku gapes, unsure if he should feel offended or not.
“What’s funny?” Izuku asks after a bit, lips unwillingly twitching into a smile of his own.
Kacchan sighs loudly, a shit-eating grin on his face as he turns to Izuku, “You didn’t even wanna fuck me at first. And then you made me squirt.” He giggles again, sighing contentedly as he closes his eyes and lays his head flat, “I just think it’s funny, is all.”
Izuku hums, a smile still on his lips, “Yeah.”
Katsuki opens his eyes again to look at him, “I meant it though. I’m younger than you, but I can still think for myself. I wanted this too.”
Izuku's smile fades at that, unable to meet Kacchan’s eyes, “Why though? You’re so young, you have the rest of your life for this kind of stuff. Especially from people who aren’t… you know…”
“What? Related to me?” Katsuki finishes for him with a questioning eyebrow, sighing when Izuku gives a small nod. “Well that’s too bad. I want you.” He says it so simply, so easily, that Izuku almost has no choice but to believe it. But there’s still parts that nag at him.
“What if you regret it?” The question tumbles from Izuku’s lips unwillingly, but with the floodgates of his worries now open, he can’t stop, “What if you get older and realize that I’m just a sick fuck with no impulse control? What if- Kacchan, what if you hate me?” Izuku hates the way his voice breaks. He shouldn't be crying, he’s not the victim here. It makes him feel so gross and pathetic, to need the reassurance that he isn’t taking too much, pushing too hard.
“Hey. Idiot, stop crying.” The bed dips with movement as Kastuki clambers over him again, cupping Izuku’s cheeks and leaning in so Izuku has nowhere to look but at him.
“If you need me to say it, then I’ll say it.” Kacchan whispers, eyes darting between Izuku’s, “I want you. I don’t care how it sounds, I don’t care how wrong it is, I don’t care if it’s allowed or not. I want you. Nobody else. And that’s not gonna change. Not ever. You’re it for me, Izuku.”
Izuku’s breath hitches, tears slipping across his temples and into his hair as he stares reverently up at Katsuki. The blonde squirms under the intense look, hands dropping to press into Izuku’s firm chest, “Say something, asshole.”
“I love you.” It’s so easy to say, and Izuku realizes that it’s something he’s been wanting to say for a really long time now.
Kacchan’s eyes widen, mouth parting into a little ‘o’. He blinks, cheeks turning a pretty shade of pink as his ears go bright red, “Oh.” Kacchan swallows, looking so cute as he obviously tries to bite back a smile before replying “I love you, too.”
Izuku reaches up to pull Katsuki down to him, enveloping him in an all consuming kiss. There’s so much that needs work, so much that needs talking about, but for right now, all they need is each other.
Katsuki’s eyes are once again hazy with lust when they separate, and he whispers between small pecks, “Wanna go again before our parents get up?”
Izuku’s cock is perking up before he even gets a chance to say yes.
⇍⇍⇍⇏⇏⇏
The rest of the day goes relatively smoothly, if not for Mom questioning Kacchan on his very obvious limp once they make their way downstairs, which he responds with by saying he slept wrong or something.
The suggestive glances and sneaky kisses behind their parents backs’ should feel a lot more wrong than it does, but Izuku can’t deny that this is probably the happiest he’s been in a long, long time. All too soon though it’s time for him to head back to his apartment, the work week looming ahead of him.
Izuku shuffles into his shoes before leaning down to give his Mom a hug goodbye, followed by Auntie Mitsuki and Dad. Katsuki is last, putting up an appropriate amount of grumbling to seem natural, their parents unaware of the way the blonde melts in his arms for a brief second before pushing away.
“So, when will we see you next, Izuku?” Dad asks, and Izuku runs a nervous hand through his hair, shooting a glance at Kacchan.
“Actually, I was gonna have Kacchan stay with me next weekend, if that’s alright? I wanted to show him the agency gym and practice with him a little.” Izuku’s heart pounds, and he hopes his nerves aren’t obvious as he awaits his parents’ answers.
“Oh, good. Get him out of the house for a while, God knows he needs it.” Auntie Mitsuki nods her approval, and Izuku feels a weight lift off his chest.
“I don’t need shit.” Kacchan gripes, but the subtle look he aims at Izuku says he’s just as excited for the coming weekend.
Izuku nods, laughing lightly, “Right. Well uh, I have to go, but I’ll come by next weekend to pick Kacchan up.” Izuku says waving one last goodbye before he steps out onto the porch and shuts the door behind him. Izuku inhales deeply, unable to stop the way his lips twitch into a smile as he turns and starts heading for the train station.
He only makes it a few feet from the house before he hears the door open, turning in confusion to see Kacchan hurrying down the steps and jogging towards him. Kacchan jumps into his arms when he’s close enough, planting a firm kiss on Izuku’s lips. Izuku follows the movement automatically, unconsciously chasing the blonde’s lips when he pulls away.
“See you later, big brother.” He whispers mischievously before turning around and walking back into the house, letting Izuku get an eyeful of his ass in those goddamn shorts again.
Fuck, Izuku is so lucky.