Work Text:
It's not the villain who does it, it's the kid they save; Izuku grabs the villain and Katsuki grabs the kid, and the kid sobs and reaches out with grabby hands and touches his face, and in her terror she accidentally activates her quirk.
Katsuki notices, of course. It's hard not to notice when your body changes. But he's a professional, and so he's able to wait until the villain is put away, and the kid is returned to her parents and with the paramedic, that he turns to both of them and asks, "What the fuck did your little brat do to me?"
The kid's moms exchange looks of horror. "I am so sorry, Mr. Dynamight. Our daughter, she—she has a sex snapping quirk. Normally she wears gloves—she must have lost them when—we can't thank you enough—”
"Back up," Katsuki says. Something heavy settles in his stomach, right above his—his— "Did you say sex swap?"
"We're really sorry," the other mom says. "And we're so, so thankful—"
"Did you get hit by a quirk, Kacchan?" Oh perfect, this is what he needs. "Did they say sex swap?" Izuku looks at him and cocks his head, studying him. Katsuki hates the look on his face. "How does it work? Because... well..."
Izuku can't seem to finish the sentence, but Shouto, who had been with him and also overheard, stares directly at Katsuki's chest and says, "I guess they are a little bigger."
It's only thanks to Katsuki's intense level of control that his palms don't pop off. He whirls around onto the mothers again.
"How long does this last?" He demands. "And exactly how does it work?" God, he can feel Deku's excitement behind him. Probably wishing he had one of his damn nerd notebooks with him.
"It, well, it changes your sexual organs. Your—and your, um, breasts. Everything functions normally, but… well, we had it studied, when it first manifested, because we wanted to make sure if— well there's no, um, pregnancy concerns." She's beet red with embarrassment—so is Katsuki, for that matter. Izuku is muttering under his breath. "It, um… it lasts a week."
"A week?" He asks. Both the moms give him deeply grateful looks that makes it harder to be mad at them.
"We are sorry, Mr. Dynamight. Thank you for saving our girl."
"Yeah, yeah," he says. Then he says, because he sees the girl being led over by the paramedics, "And don't worry about the damn quirk. Just get her another pair of gloves."
They beam at him, and he has to walk away, because he's angry and he doesn't want to take it out on this nice couple whose daughter had just been held hostage by some rookie villain.
Izuku and Shouto follow him as he walks away, and when they've moved far enough away he says, "I need to go home and… figure out what the hell is going on."
"We'll cover for you," Izuku says immediately. Shouto nods.
"We'll see you at home."
Once at home, Katsuki enters their bedroom and stands in front of their full-length mirror. He strips off his uniform and throws it into the laundry, and then he takes a look at himself.
His face is the same, hair still short and choppy, but as you get lower—
He thinks about Shouto's comment about his chest and rankles, because he was kind of right. Sometimes Izuku and Shouto will call his pecs tits, but now that's what they really are. They're softer; he runs his hands over them, jiggles them a little, scowling the whole time. They're heavier than his pecs, fattier. He runs a hand over his nipple and hisses—still sensitive.
His eyes trail lower. His stomach is still all hardened muscle, but his hips are wider. And there, between his legs, is the most egregious thing of all.
His scowl deepens. His blond pubic hair is there, but instead of resting above his cock it covers the mound of his pussy. He exhales angrily before he sits down, spreading his legs so he can see exactly what he's working with.
Katsuki's only experience with vaginas is coming out of one. He's never been interested in women, and he knows in the depths of his soul that he's found forever in Izuku and Shouto, so he'd been under the impression he wouldn't need to ever know his way around. But now he's looking at one—one that's connected to him, no less—and he has no fucking idea what he's supposed to do with it.
He prods at it carefully, like it's a bomb set to explode. He spreads the lips and pokes around. He thinks they're supposed to be wet, but he's pretty dry right now.
He pulls his hand back. This is stupid. He grabs a pair of underwear and sweatpants, and it's only when he pulls up his underwear that he realizes his clothes will fit differently now; the waistband stretches over his hips, and the fabric bunches at the front without his cock there. He takes a look in the mirror again and almost blows it up, because now that he’s wearing civilian clothes…
He looks like his fucking mother. Oh, Mitsuki would have a goddamn field day if she knew about this. He makes a mental note to tell Izuku and Shouto not to tell her anything, because she’d be even more annoying than usual if she knew how much of a mini-her Katsuki was right now.
Katsuki has the feeling this is going to be a very long week.
Izuku and Shouto return home to find Katsuki starting dinner in the kitchen. Izuku comes up to him and tentatively wraps his arms around him.
"Kacchan? Are you okay?"
Katsuki scowls at the wok. "Course I am. All it did was switch shit around. I'm still me." He's not sure why the question annoys him so much.
"I know you are!" Izuku hurries to say. “I just meant… well it must be weird, right?"
Katsuki feels immediately bad for snapping. Maybe this whole thing is impacting him more than he'd thought.
"Yeah, I know Izuku." And then he says, because it's the best way he knows to apologize, "Will you help me with dinner?”
Izuku grins at him. Apology accepted.
He takes the week off work. He has enough vacation time available, and even though he doesn't want to, all three of them agree it's what's best. It's a new body—and more than that, the whole thing is making him feel weird.
It's looking in the mirror and seeing a body he doesn't recognize. He doesn't feel any less like a man, so it's disorienting to see his reflection. The internet says this is gender dysphoria. Katsuki says it's annoying as hell. He wants his dick back.
More than that... Shouto and Izuku just don't look at him the same. And it's not like he blames them, or anything. This is not what they signed up for. But it hurts to know they're not attracted to him like this, and it just makes his mood worse.
Or that's what he thinks, at least, until morning of the third day, when they're eating breakfast before Shouto and Izuku go to work, when Izuku says, very tentatively, "Kacchan, can we—talk?"
Never a good fucking sentence. Katsuki eats a spoonful of his breakfast and hardens his heart as best he can against whatever Izuku is about to say. Maybe they want him to go somewhere else until this ends. It would explain why they've been acting so weird, why Izuku can barely look at him.
He grunts a response, and Izuku takes it as a yes.
"I was just—we were just… wondering. What you think about, um—sex. This week."
Katsuki stares at him, caught off guard. That's not what he'd been expecting. "What about it?"
Izuku is blushing. It's ridiculous what he can do during sex given he can still barely say the word.
"Oh, um. Whether you want to… have it. Still.”
Katsuki looks between Izuku and Shouto. He says, "What?"
"We were wondering if you still wanted to have sex," Shouto says. Then he adds, rather unnecessarily, "With us.”
"You still—want to have sex?”
Izuku looks at him like he's grown another head. "I always want to have sex with Kacchan."
"Even like this?” He gestures at himself.
Izuku blinks and continues to look at him funny. "I always want to have sex with Kacchan," he says again.
Katsuki huffs. Okay, fine. Izuku is bisexual. That makes some level of sense. But—
"But what about you?” He asks Shouto.
Shouto thinks his answer through before he speaks. "I'm not really sure. I don't know what it means. The internet says I might be demisexual.” Apparently Katsuki isn’t the only one looking things up. “But I'm still attracted to you. I still want you."
Something light fills his chest. "Really?"
Izuku's eyes darken, and he pulls Katsuki up out of his chair and into a bruising kiss.
"I didn't want to bring it up. I didn't want to pressure you. But if it's something you're interested in…" He pulls back and looks at Katsuki with eyes just as dark and hungry as his kiss was. "I want you so badly, Kacchan. We both do."
"But," Shouto says, looking between them and then at his phone, "we have to get to work, Izuku."
Izuku looks genuinely distraught, which eases Katsuki's own distress at the thought of the next nine hours by himself, thinking about all the things his boyfriends are planning to do to him.
They kiss each other goodbye, and then Katsuki sets out trying to find a way to kill the next hours without going completely insane.
Izuku is going to send him completely insane.
Around lunch time Izuku sends him a selfie from a bathroom stall, uniform zipped open so his hard abs are on display, cock in hand. The text that goes along with it says, Can't stop thinking about everything I want to do to you.
Katsuki groans, putting his phone to the side and trying to focus back on the dishes. This proves to be a fruitless endeavor, however, because the next text comes around ten minutes later, a link to an article that says some people with vaginas can come up to twenty times. Izuku's text says simply, Wanna try?
Do your fucking work, he texts back, trying to act unaffected—but he shuts off the water and then heads to the bedroom.
In the bedroom, Katsuki strips off his clothes and then lays down on the bed. He doesn't use a mirror this time—he doesn't much like looking at it, but he's going to have to figure out how it works if he wants to do this.
He feels… weird. There's a strange sort of tightness between his legs, and when he pokes tentatively at his pussy, he finds that this time, it’s a little wet. Stupid Deku, turning him on. He rubs his fingers between his pussy lips, and then he moves them up, looking for his clit. Katsuki might make a joke about men not being able to find the clit, but he finds it fairly quickly, a shock of intense pleasure when he pushes on it that sends his hips bucking.
What the fuck?
He tries again, taking his middle finger and rubbing a gentle circle over his clit. It feels incredible, like literally nothing he’s ever felt before. He keeps this up, and his eyes fall closed as thoughts of Izuku and Shouto fill his head.
The next time he swipes his fingers through they come back soaked; Katsuki moves them lower until he finds his hole, and then he carefully pushes one inside.
It feels… weird. Wet, and warm. A little like an ass, but not really? It’s really wet, wet enough he can slip in another finger. That feels kind of good. He moves them around a little, pumping them in and out, scissoring them, curling them inside himself and pushing on the spongy walls, and it feels good, certainly, but his clit felt much better. He pulls his fingers out of himself and goes back to circling his clit again, thoughts set on his partners. He thinks about the last time they’d had sex—Shouto had fucked Katsuki while Izuku sat on his face, because he always made the sweetest little noises when he was getting eaten out. Katsuki thinks about this, and he thinks about Izuku’s noises, and Shouto pounding into him, and how it feels to be surrounded by his boyfriends, the people that he loves the most in this world… and Katsuki rubs his clit, and he comes with a fucking scream, back arching up off the bed as he shakes and comes apart at the seams.
When he’s done he lays there, chest heaving, fighting to catch his breath as he recovers from the best orgasm he’s ever had. And some people could do this twenty times? Katsuki doesn’t believe it. He thinks he’d actually die.
He grabs his phone and snaps a picture of his wet, used pussy that he sends to their groupchat. His orgasm has wiped him out; he plans to just lay there and recover for a few more minutes, and he lets his eyes fall closed; and Katsuki falls asleep.
Katsuki wakes up to see both of his boyfriends staring down at him with identically lewd expressions as they study Katsuki’s naked body. Izuku especially is looking at him like he’s a full meal.
“Kacchan,” he says. “That picture you sent…”
It takes his sleepy brain a moment to remember what he means. Right, the nude he’d sent of his pussy after he’d jerked off. Heh. Nerd must have liked that.
“You liked that?”
In answer Izuku starts stripping off his clothes, eyes still never leaving Katsuki, who is trying not to feel self-conscious under his ravenous stare. Shouto starts undressing, but his hands pause on his belt. “Katsuki,” he says. “You’re sure you’re alright with this?”
Izuku stops, too, giving Katsuki the chance to answer. His heart swells at the way Shouto always looks out for them.
“Yeah,” he says. “I’m mostly just annoyed at this whole thing, but I’m—well, I still want you, too. And fuck, if Deku wants to live out all his weird pussy fantasies with me then sure. Not like I’m going to complain about too many orgasms.”
The grin Izuku gives him is positively feral. “Oh, Kacchan,” he says. “Famous last words.”
Izuku is trying to kill him. It’s the only explanation.
He’s had his head buried in between Katsuki’s legs for going on half an hour now, and Katsuki has lost track of the number of times he’s come already. Katsuki is on his back with his head in Shouto’s lap, legs spread and thrown over Izuku’s shoulders, because he can’t hold them up anymore. At the beginning he was playing with Shouto too, licking and sucking at his cock as Izuku ate him out, but it wasn’t long until he was unable to focus on anything else. He’d apologized, babbling nonsense after his second orgasm, but Shouto had pressed a gentle kiss to his forehead and told him it was alright.
“Don’t apologize,” he says. “I’m perfectly happy to sit back and watch Izuku turn you into a puddle.” His tone is light and teasing, and Katsuki’s fuck you, Halfie is weak and half-assed. He knows Shouto isn’t quite as into this whole thing as Izuku is; if Shouto is happy watching Izuku explore this, then Katsuki is happy to lean against him and clutch his hand for support.
It feels so good, and it didn’t help that he was overly sensitive, maybe because his pussy hadn’t fucking existed until a few days ago. So his first orgasm comes quick, and his second one comes even quicker, and by his third he’s sobbing and shaking and clutching Shouto’s hand as Izuku makes deeply contented grumbling noises.
He’s not sure what number he’s at now. He wonders if they’re anywhere close to twenty.
“Izuku,” he says, letters slurring together. “Izuku, I can’t—”
Izuku—very reluctantly—pulls back. “You can,” he says. “You’re doing so well for us, Kacchan. And you taste so good.” He licks at his lips, and then his eyes light up. “C’mere, Shouto,” he says, and he leans forward to grab Shouto in a kiss that Katsuki knows tastes like him. Shouto’s eyes close and he makes a noise as he grabs Izuku and deepens the kiss, and Katsuki can imagine, even if he can’t quite see, the way Shouto will be shoving his tongue inside of Izuku’s mouth to get every hint of Katsuki that he can.
“Fuck,” he hears Shouto say, and then he hears more wet kissing noises, and as much as he likes listening to his boyfriends kiss…
“Oi! Did you forget about me?”
With a chuckle Izuku pulls away, hunkering back down between Katsuki’s legs. Katsuki almost immediately regrets his outburst when Izuku once again looks at his pussy like it’s water to a dehydrated man.
“Izuku,” he says, weakly, hips jerking away when Izuku reaches out and pushes his thumb against Katsuki’s poor, abused clit before he smiles down at Katsuki.
“Come on, Kacchan,” he says happily. “Plus Ultra!”
They don’t get to twenty—or at least, he doesn’t think so. Eventually Izuku pulls back and wipes his mouth like he’d just enjoyed a good meal, and then he says, “Can I fuck you now, Kacchan? Please?”
More, the nerd wanted more. Katsuki was going to die. But he wasn’t about to wimp out—and besides, it’s not like he’s not enjoying himself. There’s a certain ache in his muscles and in his cunt, sure, but it’s a good kind of pain. And they haven’t even had sex yet. Katsuki remembers having his fingers inside himself and hopes that a cock feels better.
“Yeah,” he says, voice hoarse. “Yeah, Izuku, fuck me.”
Shouto and Izuku do that thing they do where they look at each other and have entire conversations, and Katsuki is shifted, rolled over so he’s laying on top of Shouto. Shouto wraps his arms around Katsuki and presses kisses into his hair as Izuku lines himself up behind them, using his hands to hold up Katsuki’s hips.
“You’re so wet, Kacchan,” he says, as his dick slips against his cunt. Katsuki would make a comment about how that’s what happens after half an hour of eating him out and who knows how many orgasms, but Katsuki’s mouth doesn’t want to fully cooperate with him. Instead he does what he can, which is shake his hips in a way that’s probably not that enticing to anyone except Izuku, and then he bites down on Shouto’s shoulder.
Shouto hisses, and Izuku’s grip tightens before he removes one of his hands to guide his cock into Katsuki’s pussy.
It does feel better than his fingers. Bigger and thicker, and Katsuki can feel himself stretch around it. He moans against Shouto’s skin, and he feels his arms tighten around him.
“You’re doing so good for us,” Shouto whispers into his ear. “You should see Izuku’s face, you’re making him feel so good.”
Katsuki is sure he will get a chance to see Izuku’s face, but right now he likes being held so tightly by Shouto. Izuku pumps into him slowly, not going too hard or too fast, letting Katsuki accommodate to his cock. He’s being gentle, slow, letting Katsuki get used to him—and Katsuki has had it with that.
“That the best you can do, Deku?” He says, lifting his head so Izuku can hear him better. “What happened to Plus Ultra, hm?”
Izuku is easily goaded into things, especially when those things involve fucking Katsuki. Those big hands settle back firmly on his hips, pulling him up as he begins to fuck into him harder, and Katsuki holds tighter to Shouto as Izuku pounds into him.
It feels good, although still not as good as his clit. He grinds down on Shouto's leg, pushes back against Izuku's dick, rocks backwards and forwards from where he's squished between his boyfriends, seeking pleasure on both the inside and the outside.
Shouto is hard, and he groans as Katsuki grinds against him. Katsuki feels the—by now very familiar—feeling of his orgasm building inside him, and his pussy aches as Izuku continues at the same frantic pace Katsuki had coaxed him into.
Shouto groans beneath him, and then comes right between their bodies. Izuku keeps going, getting Katsuki closer and closer and closer until—
He comes apart at the seams, pussy spasming and clenching around Izuku's cock inside him, who swears and shoves his hips right up against Katsuki's ass, cock in deep as he pulses and spills inside of him.
The three of them come down; Katsuki is half asleep, still curled up against Shouto as Izuku pulls out of him. He feels a towel patting between his legs, and he feels lips on the top of his head, and he hears Shouto and Izuku conversing in hushed tones above him—and then, much like before, Katsuki falls the fuck asleep.
So, okay. Yeah. That's a thing. Katsuki sleeps until dinner, and when he wakes up Izuku asks if he wants dinner in bed, and Katsuki snorts.
"Don't flatter yourself, Deku," he says, even though his pussy feels like Deku had used goddamned One for All on it.
"So?" Izuku asks over dinner. "Was that... okay?"
Katsuki tries not to let on that this is the understatement of the century. "Yeah," he says. "Yeah, that was fine. We can do it again."
Except the next morning, he's far too sore to let anything inside his cunt again. He winces as he walks and glares at Izuku, who looks altogether too pleased with himself. So that day after they get home from work he sits on Izuku's face while Shouto fuck Katsuki’s ass, and then he fingers his clit as he watches Izuku fuck Shouto, and then he takes another nap.
It isn't until the last day that they have the chance to do what Izuku has been clearly fantasizing about for days: "Can we both fuck you at the same time?"
So the night before he's set to change back, he's lying on the bed; Izuku has his mouth on Katsuki’s clit and two fingers in his ass, and Shouto is currently kissing him stupid. He loves kissing Shouto; he loves kissing Izuku, too, but there's something about the slow, deliberate way that Shouto kisses that drives Katsuki absolutely insane. Even when he's trying to speed things up, Shouto will slow them down again. The slow burning ember inside him when he's with Shouto is different from the frantic wild fire ignited within him when he's with Izuku. He loves the way the both of them make him feel.
Izuku moans appreciatively into Katsuki's pussy, fingers pumping slowly in and out as he gets his ass ready for Shouto. Katsuki feels nervous excitement thrumming through him. He's had them in his pussy and his ass, but not at the same time. And even though he is mostly still annoyed at the whole situation he can't deny he's looking forward to being this close to his boyfriends.
He tells Izuku he's ready, and then he tells him again when lzuku still doesn't make a move away from his pussy, and then he smacks him on the top of the head. He very much knows that if he lets him, Izuku will eat him out until his fucking nose prunes.
"Let's go," he says, when Izuku is finally able to pull himself away. "Before my fucking dick grows back."
Shouto sits up against the headboard and pours a generous amount of lube onto his cock; then Katsuki crawls onto his lap facing away, back to chest, as he lowers himself onto Shouto's dick. He feels the head push at his asshole, feels the resistance that breaks as Shouto keeps pushing. His hands settle on Katsuki's hips as he lets Katsuki set the pace, sinking down inch by steady inch until he’s all the way seated in Shouto’s lap. Shouto wraps his arms around him fully, shoving his face in the back of Katsuki’s lap as he struggles to steady his breathing. Shouto always lost it the minute he got inside him, and Katsuki knocks his head back a little against Shouto.
“You feel so good,” Shouto murmurs into his sweaty skin, and Katsuki takes a steadying breath himself and then looks expectantly at Izuku.
“Well?” He asks, trying for bravado, as if he weren’t any type of nervous. Izuku’s eyes are flicking between his face and where Shouto is buried inside him, and his cock is rock fucking hard. He pumps it with his hand a few times as he kneels on the bed, working around the two other pairs of legs so that he’s able to press his cock to Katsuki’s pussy. His eyes are fully transfixed now on Shouto’s cock in Katsuki’s ass; he can practically see Izuku drooling.
“Izuku,” he says, and Izuku’s eyes flick back up to his face. He grins, then, and leans forward to kiss Katsuki, a soft, tender thing completely at odds with the way he’s about to be destroyed.
“I love you so much,” Izuku says. “Thank you for this. I—I would have understood if you weren’t comfortable enough for this, for letting me do this, and I—”
“Stop making it weird,” he says, as if this entire fucking situation wasn’t intensely weird already. Izuku nods and continues to guide his dick inside of Katsuki’s pussy.
He feels full enough as it is, with Shouto inside him, and when Izuku enters him as well Katsuki throws his head back against Shouto’s shoulder and moans, completely unconcerned for how loud he is. He’s so full, the pressure inside him almost—almost—unbearable. He grasps out for something to hold onto, latching onto Shouto’s arms that are wrapped around him, nails digging into his skin as Izuku pushes deeper and deeper inside him. When Izuku has bottomed out, when both of them are pushed inside him, they all three of them have to pause and just breathe, overwhelmed by the fullness and the tightness and the warmth, and the feeling of connectedness that came from this, being all entwined together. Izuku chokes back a sob, and this time Katsuki can’t even blame him.
“Kacchan feels amazing,” he says, eyes screwed shut, leaning forward to rest his forehead against Katsuki’s. “And Shouto—I can feel you.”
Katsuki moans at this. He doesn’t have much leverage to move, balanced the way he is on Shouto’s lap, but he does his best to move his hips and entice them to move. At first the rhythm is clumsy between them, Izuku and Shouto not quite able to match each other’s pace, and he gets jolted around a little bit before they figure it out. But once they do figure it out, they’re both able to fuck into him good, Shouto pumping his hips up into Katsuki’s ass while Izuku holds his legs and fucks into his pussy. It’s bliss; it’s almost too much. Katsuki feels like he could cry, which would be absolutely mortifying. He just loves these fucking morons so much, sometimes it feels like he doesn’t have enough room in his chest for it all. In his patched together heart.
He reaches out for Izuku, arms wrapping around his neck so he can pull him in closer, somehow even closer. He wants to be closer than any three people have ever been. He feels so fucking full, Izuku pumping in as Shouto pumps out. He’s overwhelmed by love and pleasure and the littlest bit of pain, just enough to keep him alert and in the moment and not get completely carried away by pleasure.
“I love you,” Izuku says into his ear, and Katsuki is unsurprised to see tears on his face. “I love you, thank you for this, thank you, I love you—”
That’s a sure sign Izuku is about to come, and Shouto’s stuttered breathing in his ear is another. Figures these assholes aren’t gonna last long; Katsuki removes one of his arms from around Izuku’s neck and brings it down between his legs, quickly finding his clit (he’s had a lot of practice over the week). He knows what he likes, now, finger quickly rubbing circles on his clit, and his orgasm comes quickly. He must tighten up, because both Shouto and Izuku let out twin moans of intense pleasure, bucking into Katsuki’s body at the same time, and the pressure inside of him mixing with his finger on his clit has him squirting all over both of his boyfriends.
“Holy shit,” he hears Izuku say, and Shouto’s arms tighten around Katsuki’s waist, chanting his name directly into Katsuki’s ear, lips brushing against the shell as he comes. His hips shove his cock as deep inside of Katsuki’s ass as he can go, unloading himself with a loud groan as he comes and fills Katsuki up. Izuku follows after, and Katsuki whines at the feeling of the both of them shoved in as deep as they can go. He’s so full. He’s going to break. He loves it.
His boyfriends finish coming; Izuku pulls out of Katsuki first, and he dimly registers the feeling of cum sliding out of his cunt. Shouto rolls him gently to the side and pulls out of his ass, and he has to deal with the feeling on that end, too. He doesn’t hate it, actually. It’s kind of hot.
A kiss is dropped to the side of his head as Shouto and Izuku start cleaning everyone up; Katsuki, to no one’s surprise, falls asleep.
The next day, Katsuki experiences the very fucking weird situation of having an intensely sore pussy… without having a pussy.
He wakes up and is happy to discover that his dick is back, but that the ache that comes from having your cunt pounded by your stupidly enthusiastic boyfriend is also still there. It’s disorienting to feel pain in an organ he no longer has. Fucking phantom pussy pain.
“How do you feel, Kacchan?” Izuku asks when they wake up. He and Shouto are off today, although if they think he’s letting them anywhere near him they’re fucking mistaken.
“No sex for a week,” he says with a groan. Izuku laughs slightly, as if Katsuki is joking.
“Are you sore?”
“The fuck do you think?” Katsuki says peevishly; Izuku gives him a kiss that serves to mollify his annoyance.
“What if I make you breakfast?” He says, and the rest of Katsuki’s annoyance dissipates at the thought of being waited on. He grunts his agreement, and Izuku kisses him once more on the forehead before he runs out to get started.
“You made him really happy,” Shouto says. “You made me really happy, too.”
Katsuki rolls his eyes to try and mask his blush. “All I did was let you fuck me.”
Shouto hums, because he doesn’t push. It’s one of the best things about him. “Do you want the shower first?”
He drags him in for a kiss. “No, you go. I’ll shower when I’m done eating.”
Shouto excuses himself to go and take a shower, and Katsuki rolls over, keeping comfortable in their bed, wrapped up in the blankets like a cocoon. The pain between his legs will fade; in the meantime, he’s looking forward to being doted on by the ones he loves the most.