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Katsuki wakes feeling an intense heat on him. He hums and moves away from it but it follows. He makes an annoyed sound and opens his eyes to find Eijirou’s fat cock pressed hot against his face. It’s warm and big and drooling all over him. He quickly shuts his right eye because Eijirou’s rutting into his face and he nearly gets stabbed in the process.
“Oye, what the fuck?”
“Katsuki! You’re finally up. Take me into your mouth, baby, please!”
Katsuki takes a deep breath through his nose and tries not to scream at his cute boyfriend. He promised whatever Eijirou wants after all.
“Okay, Ei. Let me just grab some water.”
Katsuki tries to move to get a glass of water but Eijirou yanks him back down.
“Noooo don’t get up.”
“Babe, my mouth is dry,” Katsuki reasons. Why the fuck does Eijirou have to be so adorably unreasonable?
Eijirou grabs his chin, forcing his mouth open, and spits in it.
“Isn’t that fine?” he whines like he didn’t just fucking commit a vulgar as fuck act. But! It makes Katsuki’s cock twitch so he rolls his eyes and nods.
Eijirou smiles and it looks like the fucking sun is blinding Katsuki at whatever god-forsaken hour it is. His cock slips into Katsuki’s mouth and he doesn’t seem to have any patience so Katsuki lets himself relax. It’s easy given how lax his body is in half-sleep.
He doesn’t even know what time it is but no moonlight shines in from the curtain and the only light is from Eijirou’s hideous night lamp.
Katsuki waits until the cock is lodged deep in his throat and then moves his head.
Eijirou grabs his hair to stop him, “no! Don’t move.”
Katsuki makes a questioning sound around Eijirou’s cock and then another that makes it seem like he’s dying because Eijirou chooses to collapse on top of him.
He realizes Eijirou must have been up for a while now because Katsuki has been dragged down to the middle of the bed at perfect level with Eijirou’s cock. Horny motherfucker.
He thrashes his legs when it’s near impossible to breathe. Eijirou’s a big fucking man and he’s crushing Katsuki!
Eijirou gasps oops and turns over, locking Katsuki firmly in place with a leg.
“Let’s sleep like this!” he cheerfully exclaims and then to Katsuki’s disbelief, falls asleep.
Katsuki doesn’t think he’ll be able to sleep like this but he’s surprisingly comfortable. Figures that he’s fucking used to having this monster in his mouth. He manages to let sleep take him too, never having fully woken up.
He blinks awake to Eijirou’s infuriating Baby Shark alarm and swallows around his cock. A hand on his head managed to keep him in place all night. Eijirou is a stubborn boy even in his sleep.
Katsuki rolls his eyes fondly and starts swirling his tongue and gently sucking. He can wake his boyfriend with a blowjob today of all days. That alarm never seems to work on him anyway.
Eijirou wakes with pleased hums and gives Katsuki a brilliant smile. Katsuki can’t help but smile back from around his cock. He loves making Eijirou happy.
He pulls off and gives his slit a little lick.
“Happy birthday, baby.”
Eijirou drags him up like he weighs nothing and gives him big, wet kisses. They should leave him grossed out but the fucker can’t do anything wrong in Katsuki’s eyes.
“Thank you, sweetheart! Did I tell you I have the best boyfriend ever ? No, no, did I tell you I have the number one boyfriend??”
Katsuki shakes his head affectionately. Fucker is going to give him cavities.
They wash their faces and brush their teeth and then Katsuki lets Eijirou bend him over and fuck him hard and fast before their classes. He’s already worked up and his refractory period is nonexistent so he cums quickly. Katsuki doesn’t really even get a chance to be hard. He doesn’t really mind though. Satisfying Eijirou is always enough for him.
When they get to class, he tries to not kill their classmates for being overly friendly and hugging and kissing Eijirou as they wish him. He reasons that it would upset Eijirou.
After their classes, he cooks for Eijirou and has to deal with him being handsy the whole time. It considerably slows him down but he secretly loves it. Their friends tease them and Katsuki threatens to blow them up. It’s all empty threats and everyone knows it. Eijirou has his full attention today.
As one of his presents to Eijirou, he shortens their study time to half an hour. Just enough to get their urgent homework out of the way. But of course, that’s not enough for his boyfriend and he asks if Katsuki will at least sit on his cock while they work? Katsuki’s weak to his wishes and agrees.
He can barely focus on reading while his idiot happily does all his work. Katsuki suspects he’s used to having limited blood flow to his brain. A hard cock doesn’t seem to make any difference in his brain functionality.
Katsuki’s ready to get fucked, having finished off his work after Eijirou for once but Kaminari knocks and knocks and knocks. He demands Eijirou come down to cut the cake Sato baked and celebrate with them all as well.
Eijirou pouts saying he wants to stay inside Katsuki though! Katsuki kisses his forehead and sends him downstairs. He knows how much Eijirou enjoys this socializing bullshit and Sero has actually gotten him a pretty cool gift.
He comes down a little later dressed in his normal tank top and a flared black skirt. The class hoots and hollers and Eijirou looks at him with hearts in his eyes.
Katsuki sneers at the class and says he’s just giving his boyfriend what he wants on his birthday. They have the audacity to aww at him.
He reminds himself it really would upset Eijirou if he hurt them.
Eijirou gets some back slaps and some ' you’re so lucky' s and the party is underway. He shouts and jumps with joy at his presents and the banner they put up for him. Katsuki watches him lovingly.
When they all settle down around the dinner table, Katsuki climbs into his lap and no one says anything because this is them. They’re always all over each other.
But he does discreetly lift up his skirt and press his bare bottom against Eijirou’s cock. Eijirou clutches his waist tight and whispers “really, baby?”
Katsuki shushes him and uses his amazing flexibility to maneuver Eijirou’s cock out his zip. He sits there, breathing hard, warming Eijirou’s cock and Eijirou is so happy. He laughs and jokes with everyone and Katsuki has to tell him to not talk with a mouthful when he thanks Sato for the cake while eating a big bite of it.
Eijirou’s response is to feed him some cake. He flushes at his stupid sweet boyfriend and his stupid monster cock filling him up so well.
They manage to make it upstairs without incident and Eijirou bounces over to his side table. He takes out a silicone cock ring and before Katsuki knows what’s happening, his skirt is lifted and the cock ring is firmly in place at the base of his cock.
“What the fuck?” he rasps. He’s been fucking horny all day!
“I was hoping you wouldn’t cum until midnight! That’s the final present I want,” Eijirou’s cheerful as he says it and lies down on his bed, legs spread wide, demanding Katsuki ride him.
Katsuki groans but he’s the fucking birthday boy! And the idiots made it really late so it’s after 11 anyway. It’s less than an hour. He can do it.
He can’t do it! Eijirou’s already cum and hardened up again. It’s been too long and there are tears streaming down Katsuki’s face and his cock is throbbing and his legs hurt.
Eijirou coos at him, smacking kisses all over his face. He takes over, slamming up into his hole as he pulls Katsuki down on his cock. He does it again and again and again.
“Can you take it, Katsu? Another five minutes, my lil boyfriend?”
Katsuki sobs but nods. He’ll do it! Still, he near loses his mind as Eijirou uses his pliant body. Nothing matters but the ache in his cock and Eijirou abusing his hole.
When Eijirou pulls the ring off while fucking up into him, he cums immediately, eyes rolling back into his head, body going frigid.
“Wha - whazza time?” he demands as soon as he’s able to talk again.
Eijirou laughs and kisses him some more.
“It’s 12.03 am, love.”
Katsuki grins tiredly. He fucking did it!
“Hope you had a good birthday, you idiot,” he says to the fucking ray of sun that’s holding his heart captive.
Eijirou nuzzles into him, “the first of many with you, right?”
Katsuki’s sure his heart melts. He wraps himself tight around Eijirou. All the rest you have in this lifetime , he thinks.