4

One night, Deku didn't come to him.

Katsuki waited patiently. An hour. And then another. Laying wide awake, waiting for that little green shit to climb into his bed. Its getting late, and if anything, they should be on round two by now.

He's tired of waiting.

Katsuki climbs out of bed and saddles up next to the nerd, turned away from him on the floor. He threads his arms around the smaller boy. To his surprise, the freckled idiot actually jerks away from him.

"I'm not in the mood tonight, Kacchan." Deku states it in such a tiny, weak voice that Katsuki almost doesn't get mad. Almost.

"What the fuck you mean? Why did you come over then?" Katsuki whispers harshly, pulling on the other boy's shoulder so he could meet his eyes. His heart flips in his chest as he sees the dejected face of his fuck buddy.

"…I heard you asked Camie Utsushimi to prom."

Katsuki pauses. "Yeah, so what? She's the captain of the cheerleading team. It's fucking tradition or whatever."

"…Are you going to sleep with her?"

Katsuki stands up.

"Hey, what the fuck? C'mere." Katsuki sits on his bed and directs Izuku onto his lap so they're facing each other. Even so, Izuku doesn't meet his eyes.

"I mean… its prom night. She's going to expect it."

"…I hate to break it to you, shitty Deku, but I'm gay."

"Doesn't mean you can't have sex with women. I mean, its kind of expected. She's… she's someone people could see you with. On your level. Not like…" Izuku trails off.  

Something warm and tender blossoms in Katsuki's stomach, and he grabs at Izuku's waist, pulling him closer. He rests his forehead against the green nerd's, feeling the rapid breathing of the boy in his hands. Its ridiculously intimate, and without intending to, Katsuki feels his own heart speed up.

Katsuki's lips brush up against the sensitivity skin right under Deku's ear.

"Whats wrong, nerd? You jealous?" he whispers as he lands a few wet, errant kisses down the smaller boy's neck. Deku shivers in his arms, and Katsuki puts his hands on the other boy's butt. He rolls his hips forward, putting some pressure on Deku's front, rubbing his growing excitement against Izuku's thighs, and he feels his breath hitch.

"No way…" Deku moans, hands threading through Katsuki's hair, holding on for dear life as Katsuki gets them into a rhythm.

"If you're gonna date other people, I – ah! – want to, too…"

Katsuki doesn't correct him on the word 'date.' Katsuki steadies his counterpart with one hand as he reaches into his nightstand and pulls out the lube. As his sweet little Deku ruts into him, he makes fast work of coating two of his fingers and shoving them insistently down the back of Deku's pajama pants.

Katsuki's mouth finds Deku's as one finger probes at his entrance, and Katsuki smiles into the tiny gasp the boy lets out against his lips.

"That so…?"

His fingers work the boy open as they kiss. Deku's mouth is an addiction of Katsuki's, he's decided. His lips are surprisingly plush, and the whimpers he lets out when Katsuki sucks on his bottom lip are just music to his ears. Loves that when he hits the right spot, Deku gets more insistent, rougher, thrusts his tongue into his mouth like its going to make a home there.

He scissors his fingers, making sure Deku is nice and loose and putty in his hands before he lifts his butt up, sliding down his pajamas and boxers, releasing his swollen red cock. He actually hears the little shit inhale sharply, and he lets out a dark chuckle. For some reason, knowing how much Deku wants him really really does things for him. Deku's so obvious with it, and, Katsuki has to admit it does a little something for his ego. Not that he needs shitty Deku's approval, body or dick-wise. But if he started taking a bit more care in respect to wearing cologne and trimming his undercarriage, well, that's none of your business.

Slicking himself up, him and Deku wordlessly get rid of his bottoms, and the smaller boy is right back to straddling his lap, breathing heavy against him.

He guides Deku's hips onto him, holding his cock steady as his partner impales himself slowly, deliciously onto his eager member.

Deku sighs contentedly as he sits all the way down, but Katsuki's not going to let the nerd relax. He takes Deku's hips and moves, and the little shit groans, resting his forehead against his shoulder.

"More, Kacchan…" he huffs out, and Katsuki can't help but grin. It almost sounds like a whine, and it's so fucking cute Katsuki can hardly stand it.

"You gotta put some work in, lazy bitch." And so Deku does. He puts those disproportionately thick thighs to work and rides him like a goddamn rodeo star. They're gliding against each other, Deku's perfect dick rubbing against his stomach as he pounds into the boy's tight ass. He puts his mouth on whatever parts of the little shit's body he can have access to in the moment; licking a drop of sweat off his neck, then tracing the outline of his perky nipples, then sucking a bruise into his collarbone. Deku's such a perfect specimen, and Katsuki keeps his eyes open, watches that stupid face contort, nearing the edge. It makes him feel a little manic – he grabs at Izuku's hips and doubles up the effort, fucking back in, deeper and harder and wetter and Deku's practically sobbing against him, fingernails digging into his back, and he wouldn't change a solid solitary thing in this world –

"Ah – Kacchan – I'm gonna –"

"Cum for me, baby. Come on, shitty bitch. Show me how you cum riding my cock."

"Ah-" Deku bites into Katsuki's lip and he can't help but grin, feeling the heat of Deku's orgasm pump out between their sweaty bodies. Slumped against him, he pumps a couple more times before he's able to chase his own release. Boneless and satisfied, he kisses Deku's shoulder, and as the glazed green eyes meet his, he kisses the nerd softly. Gently. Dare he say, lovingly.

"Why do you think I'd want some boring cheerleader pussy when I have you?"

It was the closest Katsuki came to actually telling Izuku how he felt. Maybe, just maybe, the fucking turned into 'making love,' or whatever cheesy bullshit you want to call it, in Katsuki's mind. He didn't bang the cheerleader, for the record. Sure, she cried and he had to reassure her for like three hours straight that its not because she's ugly. Eventually, he just told her that he's gay, and she took that pretty fucking well. She was even super proud that 'he trusted her enough to conspire together.' Straight people are the fucking worst.

How Katsuki is sitting on that same fucking bed right now, staring across the room at Deku's fucking bed, is beyond him. Seriously, this has to be some kind of cosmic joke.

Let the records show that Katsuki Bakugou is cool with this.

He's fine. He's level headed. He's happy that his dad is happy. Sure, its kind of an unexpected development, but whatever. Deku is his step-brother now. They live together now. They're going on vacation together now. Every holiday, every graduation, every large event, will now be celebrated with…. Deku. As a fucking family.

Katsuki grinds his teeth so hard he's fairly sure he's cracked his jaw.

Katsuki's not cool with this. He's not even remotely fucking cool with this. Look, he's not being unreasonable. He's been inside Deku. There's no going back on the fact that he knows exactly what Deku looks like when he moans, when he cums, what that mouth looks like stretched around his cock. He's fucked that slutty bitch in every goddamn corner of this town in every fucking way that someone can get fucked! And now Deku had some kind of fucking growth spurt and put on a ton of muscle (particularly in his legs. What the fuck? What was he doing? That ass is… magnificent.) and even though his face has thinned out, he still looks like a fucking angel with those bouncy curls, that light dusting of freckles and those penetrative green eyes. Jesus Christ, Deku looks so fucking sexy Katsuki wants to deck him.

Sexy? Katsuki didn't think that. Whatever. What-the-fuck-ever. He's not into Deku anymore. He's a Harvard man. He's smart, he's classy, he's set up for success, he can have literally anybody he wants and what he doesn't want is to bang his step-brother.

Holy shit, he wants to bang his step brother. Hold up, not just bang. He wants to annihilate him. Like, break the little green bitch in two. Deku deserves it, too. The audacity. The first time he sees that fuck in three years, and he has to watch some tiny round girl grope him under the table? He's going to make Deku pay.

He's never wanted anything so bad in his entire life. The fact that he shouldn't want it, makes him want it all the more. Funny how things work.

What the fuck is he supposed to do? Fucking Deku is moving into HIS CHILDHOOD BEDROOM. Fucking Deku is going to be sleeping literally six feet apart from him. He's sincerely gonna have to castrate himself so the sheer desire to ravage the green fuck doesn't make him sleepwalk right into his bed.

He takes out his phone and goes into the group chat, looking for any fucking distraction from the fact that Izuku fucking Midoriya is bringing boxes of his shit into Katsuki's childhood room. And that the fuck is sweating and wearing shorts that probably stopped being length-appropriate for his body in fucking middle school.

Again, the legs? What the fuck is he doing with his thighs? Deku seems to have grown out of those skinny jeans and gigantic hoodies, and Katsuki hates to admit that he is here for it. If Deku finally has the lower body strength to hold him up, then there's a couple new ideas that Katsuki would be very interested in trying out….

Nope! No. No, no, no. Step brother. Has girlfriend. Katsuki actually maybe possibly loved him maybe. Urgh, fucking disgusting. Katsuki wants to gag himself with a spoon. Where are all these gushy fucking feelings coming from? That's three strikes, you're out. End of story.

He was supposed to have a nice, peaceful summer where he could study with no distractions and be left the fuck alone. Jesus, his entire life is a goddamn joke. He has to tell somebody. The idiot brigade likely won't have anything useful to tell him, but maybe they'll commiserate with him.

SharkWeek🦈: afjakljdfalkdjsflasl;dfajsldf;jaldfjasl;df

SharkWeek🦈: you have to be fucking kidding me, man

Spidey🕸️: this is the plot of every porn ever

Spidey🕸️: on Thanksgiving, turkey isn't the only thing that's gonna get stuffed

Spidey🕸️: on Christmas, the present won't be the only package he's opening

Spidey🕸️: birthday? Surprise its more dick 

Pikachu⚡: YOUR EX IS YOUR STEPBROTHER

Pikachu⚡: bitch you nasty

Bakuhoe💥: who the fuck changed my name in this groupchat

Bakuhoe💥: this shit ISNT FUNNY

Bakuhoe💥: and he's not my ex – he's just a fuck buddy from high school

SharkWeek🦈: dude, you know that you've drunkenly fucking recited poetry about the guy?

SharkWeek🦈: this is us you're talking to

SharkWeek🦈: Mr. World's Most Perfect Ass and Softest Lips and Makes My Heart Explode

SharkWeek🦈: don't make me send you the video again bro

Spidey 🕸️: does Perfect Ass know you still dig him?

Bakuhoe💥: are you fucking insane?!

Bakuhoe💥: the fuck went and got a girlfriend

Bakuhoe💥: he's my STEP BROTHER

Pikachu⚡: bakuboy

Pikachu⚡: don't be a bakubitch

Pikachu⚡: rail your brother like a MAN

"Kacchan?" Katsuki actually yelps and tosses his phone away from him, for fear that somehow the little green nerd would see what the hell he's typing. The last thing he needs to do is tell, hm, his step brother that he has feelings for him. He's not about to make this mortifying situation even worse.

On the one hand, if he's into it… Katsuki would be banging his step brother. Which is, objectively, not great. On like, some kind of moral ground. On the other hand, if he's not into it… Katsuki has to live with the guy that rejected him, and who, by the way, is also his step-brother. It's a lose-lose scenario. Just like his entire fucking life right now, he supposes.

"… Uh, I-I'm sorry, I hope I'm not imposing too much, I promise I won't hang up any posters or anything, I know you like your room really clean so I'm going to be tidy I promise, I'll try to stay out in the living room or go out during the day so I won't bother you, I know you have to study and stuff, and…"

Oh, what? The little dork thinks that he has to skirt around Katsuki? No! If Deku can fucking handle it, Katsuki can double handle it. Triple.

"Stop rambling. I don't fucking care where you are. Your dumbass is barely on my radar." Katsuki lies openly.

"R-right." Izuku responds, sitting down on his bed. He glances up behind his fringe, and Katsuki begs the universe to not let the little green fuck see the blush that he's sure has spread to his cheeks.

Bakugou Katsuki doesn't blush. Bakugou Katsuki doesn't get flustered. Bakugou Katsuki is a fucking machine, physically, intellectually, sexually. He doesn't get freaked out. Definitely not by some freckled little nerd.

Katsuki watches the nerd pick at his fingernails, silently fidgeting across from him, and its really starting to prickle at his nerves.

"You got something to say to me?" Katsuki growls, suddenly wishing that the room was much larger, because six feet between him and Deku is dangerously close. It would take, what, three solid steps? and he can have the nerd pushed against a wall and take what is rightfully fucking his…

"...Its good to see you." Izuku whispers, a sad smile spreading on his face. Katsuki hates it. Katsuki despises it. Katsuki wants to fuck it right off his mouth.

No! Stop, Katsuki. Down, boy.  

"Well, you'll be seeing a fuck-ton more of me." Katsuki says, and instantly curses his word-choice with how big Izuku's eyes get. And how fucking cute he looks with that blotchy blush dotting his cheeks.

"I must have really pissed someone off in a past life, and this is my fucking punishment. Having you as my fucking brother."

Izuku flinches at the word.

You know what? Katsuki's decided that this whole thing is Deku's fault. Katsuki's been gone for the past three years, but the nerd was in town. How did he not notice that his mother was banging his father this whole time? Katsuki knows the spazz is a spazz, but he's also pretty fucking perceptive.

On the other hand, him and Deku fucked for a solid two years and their parents never questioned why two grown-ass teenagers wanted to have regular sleepovers. So maybe dumbassery is hereditary.

"Is it really… so bad to have me as a brother?"

Katsuki's eyes widen and he just stares at the shitty green bitch in front of him. He has no right to look so fucking sad about that. What, his sweet slutty cocksucking Deku actually wants Katsuki to think of him as a brother?

Jesus, what the fuck?! Here he was thinking he'd have to develop the self-control of a priest in a whore-house, but looks like his brother wants to actually be his… brother.

Katsuki internally slaps himself when the thought is, in spite of itself, still pretty hot.  

"I didn't sign up for any of this shit, actually, Deku. But – "

Look, its not like it didn't cross Katsuki's mind. The first thing that Katsuki thought about when Deku's mom told them that she went and married his stupid idiot father, is that he needs to split those two up immediately. But, shit. He hasn't seen his dad this easy-going or carefree since…ever. Deku's mom seems to have balanced him out, brought out that smile that Katsuki was convinced disappeared when his mom ran out on him. He's maybe a little sharp around the edges, but Katsuki's not heartless.

"I'm going to fucking do this. For them. So shut the fuck up, stay away from me, and if you're gonna be porking your round-faced girlfriend in this room, fucking barricade the door because if I have to see that tiny cock try to pleasure a woman, I'm going to claw my fucking eyes out."

Deku's cock isn't tiny. Deku's cock is actually quite great. Deku's cock tastes fantastic and Katsuki would be very down for that same cock to be fucking his throat, right now. Katsuki wants to fucking explode the entire planet at the prospect of Deku's perfect cock in a woman. Its fucking disgusting.

He says none of this as he grabs his workout gear and stomps out of the room, slamming the door behind him. He doesn't look at how dejected and devastated the nerd is, and definitely doesn't take a tiny bit of pleasure in the fact that he still has the power to make that little bitch teary-eyed.

Katsuki can do this. He can make it through these next two months.

Its just two months.