Chapter Text
Bakugou sits cross-legged on his bed, his phone balancing on his left leg while he takes notes on his right. He's watching his training videos from today and making note of every misstep or miscalculation or whatever other imperfections he sees.
Kirishima is at his desk, diligently reviewing this week's course material in a valiant effort to stay on top of his studies instead of procrastinating three days before finals like usual. It'll probably be a week until he falls back into old habits, but his attempt is commendable.
Sero has long since accepted that he'll always be a procrastinator and makes no such attempt. His homework is spread out in front of him, half-complete and abandoned in favour of playing a mobile game, diligently trying to get past a boss battle for the past hour.
When he dies for the third time, Sero closes the game with a despondent sigh and drapes himself over the table in defeat. He's about to open another app when he sees that there's new messages in their group chat from Mina and Denki.
He's surprised to see them active given they're supposed to be on patrol tonight, so he opens the chat with a flicker of concern. It all goes out the window once he reads their messages, however, and he immediately jolts upright.
"Kiri!" He whispers fiercely, but Kirishima has his earbuds in and doesn't hear him. Sero throws an eraser at him and whisper-yells again, "Kirishima!"
Kirishima frowns, chucking the eraser back at him. "Dude, what? I'm actually getting some work done here."
"It's important! Check the chat."
Kirishima squints at him suspiciously, but then does as he's told. Sero knows he's read the messages the second his leg starts bouncing with excitement. He pulls out his earbuds and gestures wildly at him.
"Dude, this is awesome! But do you think he'd wanna…?"
They slowly turn to Bakugou who, after three and a half years of friendship, is now an expert at tuning out their shenanigans while he's working.
Sero looks back at Kirishima expectantly. Kirishima, an expert in his own right at silent communication, immediately catches on.
He twists around in the chair, swings a leg over so he's straddling it backwards, and drags the chair with him when he scampers up to the bed with an ungraceful flap of his legs. Bakugou doesn't even blink, his expression void of anything other than a single-minded focus on his work.
Sero army crawls towards the bed. He props his elbows up and rests his chin on his fists. The two of them stare at Bakugou until he finally looks up at them and scowls.
"What? Quit staring at me, you creeps." He shoves his foot into Sero's face. Sero pushes it away without so much as a flinch.
"Are you busy?" Kirishima asks.
Bakugou squints at him suspiciously.
It's a dumb question, he thinks. He's never not been busy ever since they started their fourth year, and he's only getting busier the closer they get to graduation.
The answer is yes. The answer is always yes. Which means Kirishima wants something. He's testing the waters, and Bakugou knows better than to give in without a fight.
"What do you want," Bakugou demands.
"Mina and Denki got double-booked tonight!" Kirishima explains excitedly.
"So?"
"So they got sent back!" Kirishima leans forward and catches himself on the bed, face inches away from Bakugou's. "So they're on their way back here."
Bakugou pauses. "Oh."
"Yeah, oh." Sero grins.
Bakugou inhales long and slow, air hissing through his teeth as he worries is lip in thought. He frowns at his incomplete notes in a moment of deep contemplation, but ultimately sighs and shakes his head. "I gotta finish this tonight."
"You can finish tomorrow." Kirishima spins the chair sideways so he can roll onto the bed and lies on his back, head half-resting on Bakugou's right leg. "Please? It's been a month."
"I sucked your dick literally two days ago," Bakugou retorts, unabashed.
"And it was awesome, but you know what I meant." Kirishima pouts. "I wanna make you feel good."
Bakugou looks down at him like he's being stupid, which he often is, and is currently being. "Kirishima, you dumb fucking bitch, what part of me creaming myself while choking on your fat dick makes you think it doesn't make me fucking feel good?"
Sero snorts loudly. Kirishima buries his face into Bakugou's lap and cries, "That's not what I meant!"
"You're bending my notes!" Bakugou pushes him off and aggressively scooches away. "Haven't even played it back in slo-mo yet."
"This is why you need glasses," Sero snickers, earning another foot to the face. He joins them on the bed, sliding up on Bakugou's left. "Kiri's right, though. Our schedules haven't lined up in ages. We've got a pretty lucky break here."
Kirishima reaches his hand up to Bakugou's face, squishing his cheek up into his oversized glasses and knocking them askew. "C'mon, Bakubabe. Spa Day?"
Bakugou bats Kirishima's hand away and averts his gaze, unsure.
Spa Day became a thing at the end of first term last year, at a time when Bakugou had been very, very stressed.
So his four best friends surprised him with a personal spa day to help him relax, during which Bakugou made a life-changing discovery: he actually kind of likes it when all he has to do is lie down and feel good.
His friends had also learned a few things that day - that they all very much enjoy being the ones to make Bakugou feel good, that his skin is soft everywhere, and that maybe they've been harbouring way more affection towards him than they'd initially thought.
These discoveries were made while giving him a full-body massage.
Long story short, "Spa Day" has now become code for "ravish Bakugou so utterly and thoroughly that he forgets his own name and blacks the fuck out."
Bakugou loves Spa Day.
The only problem is that it lasts all evening, well past his usual bedtime, and the mornings after are the only times he ever sleeps in. It's hard enough to find time for it, let alone make time - and between all five of their internships across three different agencies, it's damn near impossible.
So the fact that Mina and Denki are suddenly available really is as lucky as breaks can get, and it's true that they haven't had a chance in weeks. Bakugou doesn't want to pass up the opportunity, but he still has so much left to do - a report to write for his internship, costume updates to hash out, a new technique to workshop…
"You don't want to?" Sero asks when he takes too long to respond. He fixes his glasses for him, fingers ghosting along his jaw when he does.
Bakugou drops his head back against the wall with a sigh. "It's last minute."
Which means they just need to try a little harder to convince him.
Kirishima sits up and slides his arm under Bakugou's shirt around his waist, massaging his side. "Nothing you can't move around?"
Bakugou makes a protesting noise in the back of his throat. "Cut it out."
"No idea what you mean," Sero drawls, then licks a stripe up his neck and trails kisses up Bakugou's jaw, sucking under his earlobe.
"Hng…!" Bakugou shivers, hairs rising on the back of his neck.
Kirishima rubs circles into Bakugou's hip bone with his thumb and kisses his neck. He gently bites down and elicits a restrained gasp from the blonde.
"Hold on—"
Bakugou tries to lean away, but Sero sandwiches him in and keeps wetting his neck from the other side. A mix of temptation and annoyance bubbles up inside him and Bakugou explodes with a fierce yell, shoving them both aside.
"I SAID HOLD ON!"
"Ack!" Kirishima catches himself on the headboard while Sero laughs, holding his hands up placantly. Bakugou scowls at them.
"I've been wanting this too," he roughly affirms, viciously wiping his neck with his shirt, "but I am not letting you horny bastards keep me from being responsible."
Because as much as Bakugou really loves Spa Day, he still has a perfect record to maintain.
He makes a show out of grabbing his phone and opening his calendar to make it abundantly clear that he isn't convinced yet, and that rescheduling is a huge pain in the ass, and that he really would've preferred it if they'd given him a twenty-four hour notice before trying to pencil him in for marathon sex.
"I'm training with Uraraka tomorrow morning," he announces brusquely.
"You can postpone!" Kirishima quickly says. "She hates waking up early, anyway."
"And I told my dad I'd call 'im."
"You can do that whenever," Sero says.
"And now I'll have to do today's stuff tomorrow."
"We can help! We'll take care of food," Kirishima offers. Bakugou gives him a doubtful look. "And we'll, uh, make sure nobody bothers you?"
Bakugou scoffs. "Who d'you think are the ones bothering me in the first place?"
Sero bumps shoulders with him. "Aw, quit being mean. It works out, right?"
"Don’t enable him," Bakugou gripes. "If I'm gonna go through the pain of rescheduling shit then you'd better make it fucking worth it."
"I will!" Kirishima shoots up to his knees and puts his hand over his chest like he's making an oath. "I promise I won't come until you do!"
Bakugou stares him down.
Kirishima gulps. "Twice?"
He crosses his arms.
"Three times…?"
Bakugou grunts in approval. "That goes for you too, Sero."
Kirishima and Sero exchange a wary smile. "But that's a yes, right?" Kirishima asks.
Out of principle, Bakugou gives them both a pointed glare. It only makes them shuffle closer. Bakugou grumbles down at his incomplete notes and sighs. "If either of you come before I get my three I'm kicking you out with blue balls and going straight back to work."
"You're the best!" Kirishima cheers. He gives Bakugou a hug, which Bakugou swiftly blocks with his elbow so really it ends up being more like an awkward pat on the back, before scrambling off the bed. "I'll go wash my hair!"
Kirishima practically sprints out of the room, grabbing the keys on his way out and locking the door behind him.
"I'll let Mina and Denki know," Sero says, shooting their group chat a quick message.
"Nn," Bakugou grunts in acknowledgment and goes to clean up as well, leaving Sero to clear the bed and get everything ready.
He already showered after training, so Bakugou just washes his ass and brushes his teeth. He comes back out a few of minutes later wearing the same black V-neck and sweatpants as before.
The bed has been cleared of all foreign objects and stripped of its blanket, which sits neatly folded up in front of the closet. The bed is taken up instead by an abundance of pillows, one at the head and a few extras lined up down the wall for easy access.
Their bag of sex supplies sits by the bed next to a few bottles of water taken from Bakugou's mini fridge. It's a small, nondescript thing packed with lube, condoms - mostly for Mina until she can get an IUD since Bakugou's a bonafide cum slut - a few designated clean up towels, and a small collection of toys.
Sero sits on the edge of the bed, already stripped down to his underwear and trying to text with one hand while palming himself with the other.
Bakugou kicks him as he walks by. "Pick one, dumbass."
Sero laughs and starts texting with both hands. "They're getting dinner. I told them to get us nikujaga, that okay?"
"Spicy?" Bakugou asks, flopping onto his bed. He takes out his phone and messages Uraraka to push back their start time.
"Plain," Sero hisses belligerently.
"Because of the time with the mapo—?"
"Yes, because of the time with the fucking tofu."
Bakugou cackles madly, kicking away the pillow that Sero promptly throws at him.
"Half an hour, Bakugou!" Sero cries, gesturing firmly at his crotch. "I had my dick in a cup of ice water for half an hour!"
He laughs harder. "There's actually this chilli lube—"
"NO."
Sero hurls another pillow at him, which Bakugou catches out of the air and stacks it under him to prop his head up higher - all the better to keep laughing at his friend.
Sero sniffs, mock-dejected. "Anyway, they're also getting mochi from that place we like."
Bakugou's eyes light up at that. "Soybean?"
"Of course," Sero grins.
"Fuck, you're my favourite," Bakugou declares, earning a jovial laugh and an affectionate pat on the knee.
They settle into a comfortable silence. Sero goes back to multi-tasking and Bakugou rolls onto his side, opening his calendar to reorganize tomorrow's schedule.
Uraraka responded with a confirmation on the new time, so Bakugou changes their session from 6AM to 9AM. They're still training for two hours so he has plenty of time to try his technique, but then after he has to finish his analysis, so he'll have to delay his phone call. Fortunately his dad won't mind if he calls during lunch instead of before. If anything, he'll just be happy to see that Bakugou is eating well.
That gives him the afternoon to finalize his costume updates, but he'll have to be efficient about it because after dinner he'll have to write and edit his report so he can have both documents ready in time for Monday. He hates getting less than eight hours of sleep, but he hates turning in half-assed work even more.
A twang of uncertainty strikes him in the chest when he finally closes the app. His nerves are tingling with anticipation; he wants to indulge so fucking bad, but that doesn't mean he can shake the restless feeling that keeps nagging him every time he thinks about how tight his schedule has become.
"Hey," Sero calls, having sensed his rigid energy. "You're good, right?"
"Nn."
Sero squints at him suspiciously. "What's the stuff you're pushing to tomorrow?"
Bakugou waves his hand. "Usual shit. Analysis, costume stuff, report."
Sero looks at him incredulously. And then he shoots his tape and snatches Bakugou's phone right out of his hands.
"HEY!"
Sero blocks Bakugou with one arm and hastily opens the calendar, frowning at the list of events that block off the entire day.
"Dude, you've gotta give yourself a break."
"The fuck do you think Spa Day is?!"
Sero shakes his head. "Doesn't count if you're just gonna overwork yourself the next day, man. What's the lowest priority?"
Bakugou glowers at him, seething. Sero patiently waits for an answer. Bakugou begrudgingly concedes with a petulant groan.
"Analysis. The report is due Monday, but I need to submit the costume changes by then too if I want them done in time for joint practice with Class B."
"Alrighty then, what about this: finish your report after training, do your lunch call, and then for the rest of the day you can take your time hashing out the details for your costume. And then if you have time, work on your analysis."
"If I don't have time then I'll have to do it Monday."
"We don't get much homework on Mondays. You'll be able to get it done and still get enough sleep," Sero reassures knowingly.
Bakugou glares at Sero for a long moment as he contemplates this alternative. He finally relents with a heavy sigh and drops his head against Sero's shoulder.
"Fuck, okay, yeah that works."
Sero pats his head affectionately and promptly makes the changes.
With the help of accidental friendships, reluctant forays into emotional vulnerability, and a decent amount of space away from his parents, Bakugou has been able to grow past a lot of his old behaviour. His obsessive perfectionism is by no means one of them, however, but Sero has figured out ways to at least make it more manageable.
"Want me to be your sounding board?" Sero asks once the new schedule is all set. "I know that's usually Denki's thing, but he's definitely got patrol tomorrow and I'm not doing anything."
"I already worked out the ideas with him, the rest is just specs'n shit," Bakugou says, voice muffled against Sero's shirt. "Thanks."
Sero holds him close by the waist and kisses his hair. "'Course, dude. What're friends for."
"Nn."
Bakugou exhales deeply. His nerves tingle only with anticipation now, his restlessness gone and forgotten.
Sero returns Bakugou's phone, which he sets aside. They sit leaning into each other, simply enjoying the other's company and warmth for a moment.
Then Sero loosens his grip around Bakugou and gently nudges him off his shoulder. He cups Bakugou's cheek with his free hand so they're facing each other and brushes his hair back. He leans in close until their foreheads are touching and their lips are just a hairsbreadth away, a silent question.
"Kiri's not back yet," Bakugou murmurs, his breath ghosting over Sero's lips.
"It's been like, ten whole minutes. Also I'm getting cold."
Bakugou scoffs. "Fine, c'mere."
He wraps his arms around Sero's shoulders and guides him up the bed so he can lean against the headboard. Sero straddles him and gingerly removes his glasses. He sets them on the shelf behind Bakugou, then closes the distance between them.
Sero takes his time getting started up. Their kiss is sweet and subdued, lips simply pressing together as their hands roam each other's bodies. Sero shivers at the warmth of Bakugou's touch, his calloused hands rubbing broad circles from his shoulders down his back. It makes him gasp quietly, his lips parting just enough for Bakugou to slip his tongue in.
Sero welcomes it with a pleasant sigh. Their tongues dance around each other lazily and Sero opens his mouth further so he can more easily push back. He circles the tip of Bakugou's tongue with his own and presses into it, sliding up and into his awaiting mouth.
He gets a thorough taste before pulling away, licking his lips. "Mm, sweet."
"Don't have glycerin in my mouth," Bakugou says breathily.
"I dunno, sure tastes like I'm gonna get cavities."
"Glycerin doesn't damage enamel, it's in toothpaste," Bakugou says between kisses. "And it barely counts as a sugar. It has a low glycemic index, even diabetics can have it." He pulls back with a hardened gaze, switched fully to tutoring mode. "It's not even used as a fucking sweetener, they just use it to keep shit from drying out—"
"Oh my god, dude, I'm sorry, forget I said anything," Sero says with mirth.
Bakugou huffs. "Don't call me dude when we're making out."
"Sorry," Sero laughs breathily and leans in again.
He takes his time working his way back into Bakugou's mouth, caressing his cheek to coax Bakugou into relaxing his always-clenched jaw.
Bakugou sighs into the kiss, mouth open and inviting. The tension in his shoulders eases away little by little as Sero massages his tongue with his own. He sucks gently on his bottom lip, sinking into the feeling of Sero's breath mixing with his own.
Sero breaks apart to catch his breath and rests his forehead against Bakugou's, taking in his bleary eyes and swollen lips.
God, he thinks. He's so fucking pretty.
It sends a spark of heat straight down to his crotch and Sero slots himself between Bakugou's legs. He inches backwards, tugging at his hips to get him to move down.
Bakugou blinks out of his daze and frowns on instinct. "What?"
"Lay down," Sero instructs gently. Bakugou shimmies down the bed until he has enough space to lie back. Sero spreads Bakugou's legs and presses their groins together. "Comfy?"
"S'fine," Bakugou says, a faint blush rising in his cheeks. He's grumpy about it, but Sero isn't worried. It always takes Bakugou a hot minute to get into it, even when he's the one initiating. Force of habit, Sero supposes, so he accepts his response and starts rolling his hips.
He sets a slow pace to start, but grinds hard enough for Bakugou to let out a satisfied hum.
It never gets old, watching Bakugou relax into the steady rhythm of pleasure - the way his eyes flutter as he fights to keep them open, his lips parting as he breathes a little harder, the crease between his brows smoothing out bit by bit.
Bakugou lets his body move with Sero's. He keeps his hands resting by his sides, scratching lightly at the bedsheets as his cock starts to fill out and twitch with interest.
Thoughts of schedules and to-do lists are steadily replaced by the feeling of hands touching him all over and the hot press of Sero's stiff cock against his own. Bakugou closes his eyes and, with a deep sigh, lets himself relax into the thrum of arousal.
Until a sudden knock abruptly snaps him out of his daze.
The door swings open and in Kirishima comes in with a towel around his neck, hair flat against his head and dripping wet.
"Yo, Bakubro! My hair dryer broke so I'm gonna borrow yours— oh shit, sorry! Didn't mean to interrupt."
Bakugou tempers himself with a heavy sigh and rubs his face. He was just starting to get into it, too.
"Whatever. Not like we did much," he says despite the fact that he's fully erect, his blush has reached his ears, and that Sero is still blatantly dry humping him.
It's very unconvincing, and Kirishima wants to be a part of it. He drops his towel over the chair and kneels by Bakugou's side, hair dripping onto the bed.
"Me too?" He asks, pursing his lips. Sero, ever the little shit, grabs his face kisses him instead. Kirishima blows a raspberry against Sero's mouth and jerks away. "C'mon man, you know I meant Bakugou!"
"I get first dibs," Sero declares. "Right, Baku?"
Bakugou grunts in approval, to which Kirishima whines.
"I don't want you dripping all over me!" He snaps, sitting up so he has more leverage to shove a pillow into Kirishima's face. "Hurry up and go dry your hair!"
Kirishima clutches the pillow against his chest and pouts over it. "Are you gonna keep going without me?"
"Yeah, and if you're not done before we are then that's your problem."
Kirishima gasps, clutching his chest with a theatric look of betrayal in his eyes. "You wouldn't! Watching you cum is my favourite part!"
"Then I guess you'd better fucking hurry up then!" Bakugou smacks another pillow into his face for emphasis, just in case it isn't abundantly fucking clear that he means it.
Kirishima, wisely reading the message loud and clear, drops his now-damp pillow next to the bed and rushes to the bathroom while towel drying his hair in a frenzy.
Bakugou glares at his back all the way until the bathroom door closes. Only after he hears the sound of the hair dryer does he fall back onto the bed with a disgruntled sigh.
"Fuckin' meathead."
"His timing is truly impeccable," Sero laughs. He runs his hands up and down Bakugou's arms, gently coaxing him back into relaxing. "You sure you don't wanna wait?"
Bakugou hooks an ankle around the backs of Sero's thighs and looks him in the eye. "That fucker's gonna take at least another ten minutes. You could make me come twice in that time if you try hard enough."
Sero waves his hand in front of his face. "Nah, that's Kiri's thing. I don't have that kinda stamina."
"Well you sure as hell don't have time for your usual edging bullshit." Bakugou furrows his brow with a look that tells Sero he's thinking about schedules again. "Next week though…"
"Ah~ we've created a monster," Sero laughs, shaking his head with an affectionate smile.
Bakugou scoffs. "As if you assholes are any fucking better."
"Guilty as charged," Sero admits. They did start feeling him up first, after all.
There's a sudden quiet when the hair dryer turns off, and for a moment they look at each other thinking that somehow Kirishima's already done. They hear the muted sounds of him searching the drawers for something and the tap running for a split second before the dryer turns on again.
"Teeth," Bakugou says knowingly. "Alright, my dick's gone soft and I wanna come already, so."
Without giving him time to process, Bakugou hooks his arm around Sero's neck and yanks him down into a searing, open-mouthed kiss to bring his attention back to the task at hand.
Normally Sero likes to take it slow, likes to tease Bakugou with his "edging bullshit" until his cock is red and weeping and there's tears in his eyes, but Spa Day is all about giving him everything he wants, when he wants, so Sero happily does just that.
He meets the kiss with just as much force, shoving his tongue deep into Bakugou's mouth and rutting faster to match their new pace. Sero feels him growing hard again in record time, the intensity quickly letting them pick up where they'd left off.
It isn't long until their cocks are both fully tented in their underwear and twitching against each other. An especially well-timed thrust causes a shudder to run all the way up Sero spine and into his neck and he moans into Bakugou's mouth.
He pulls away from the kiss with a gasp and sits on his heels, giving himself a break while he gets Bakugou closer to the edge.
Sero slides his hands under Bakugou's shirt and gives his pecs a firm squeeze. His shirt is covering them, but there's something about seeing his hands shifting underneath the fabric that's really doing it for Sero, so he leaves him covered for now.
He starts circling his nipples with his thumbs, delighting in the way Bakugou trembles beneath him. He teases them until they're hard, then starts pinching and rolling them between his fingers until Bakugou's panting and Sero can see a wet spot staining his bulge.
Sero doesn't hesitate to drag one of his hands down Bakugou's stomach and grip his clothed erection, stroking it firmly from base to tip.
"Nn…" Bakugou keens into the touch, chest arching just slightly off the bed as he seeks more contact.
It makes his shirt drag up just an inch or two higher, giving Sero a teasing glimpse at what's hiding underneath. His abs flex from the movement, accentuating every dip and curve of his deliciously toned yet lithe body.
Sero swallows thickly. He takes a deep, shuddering breath until his cock stops twitching and briefly pauses his ministrations despite Bakugou's protesting grunt. "Sorry, one sec."
He leans over the bed to open the sex bag and digs around until he finds one of their many cock rings. It's a T-style ring that fits just a smidge too tight around his shaft and balls - all the better to make him last longer - but attaches with buttons so he doesn't have to worry about getting stuck.
"Already?" Bakugou teases despite the fact that he's looking distinctly hot and bothered himself.
"Yes, already, you stupid-hot asshole," Sero hisses, waiting until his cock softens a bit before snapping the ring on and tucking it back into his briefs.
"Who, me?" He stretches his arms above his head and angles his hips to show off his waistline, posing like a god damn pinup model with his neck exposed. He casts Sero a sultry, sidelong gaze, licking his lips with a predatory grin. "No idea what you mean."
Sero whimpers.
It's objectively tame, especially compared to the dozens of other salacious poses and positions that Sero or any of them have seen him in - he isn't even naked, for crying out loud.
But here's the thing.
There isn't a single force in the world that's greater than a Bakugou Katsuki who knows exactly how little it takes to have them all wrapped around his finger.
He has perfect skin, perfect muscles, a perfectly slender waist, and every time he puts all that perfection on display with his unshakeable confidence, Sero is fiercely reminded that it is a motherfucking privilege to have Bakugou laying under him, allowing Sero to give him his full, undivided attention.
So it's really not his fault that his dick is immediately threatening to burst out of his cock ring and he groans into his hands.
Bakugou barks out a laugh, pressing his leg up against Sero's prominent bulge. "The sooner you make me come the sooner you can take it off."
Sero swallows around another groan and takes a long, steadying breath, dragging his hands through his hair.
Okay. Okay. Time to get serious.
He positions himself so his crotch is snug against Bakugou's again and leans forward for another kiss.
It's tamer this time, but just as wet and intimate as their tongues reach deep into each other's mouths. At the same time, Sero pushes Bakugou's shirt up the rest of the way, bunching it over his chest to frame his perfectly sculpted pecs and expose his pert nipples.
Sero breaks the kiss and leaves a wet trail from Bakugou's neck to his chest. He drags the flat of his tongue over Bakugou's left nipple while teasing the other with his fingers.
He laves and sucks on and around the nub until Bakugou whines at the back of his throat, then he pulls off with a wet pop and switches to the other side, giving it the same thorough treatment until they're both swollen and glistening with spit.
Bakugou's voice keeps coming out in small bites as his skin buzzes with arousal. He rakes his fingers up Sero's undercut and weaves them into his hair, gripping tightly as his cock strains against his waistband and aches for more.
Then Sero shifts just slightly, the length of his clothed erection rubbing up against Bakugou's taint, the tip prodding up against his balls, and Bakugou drops his head back with a shameless moan.
"Ahh, shit—!"
He lets go of Sero's hair and drapes his arm over his eyes, grabbing Sero's wrist with the other and urging him to hurry up and touch him already so he can reach his first of many orgasms of the night.
Sero wastes no time to comply. He pauses briefly to lift Bakugou further up into his lap and snakes his right arm under Bakugou's back so he can latch onto his chest again.
Then, finally, he reaches his other hand into Bakugou's underwear, wraps his fingers raw around his throbbing cock, and starts pumping vigorously.
"Fuckin' shit, Sero—!"
Bakugou bucks hard into Sero's hand, moaning loudly as Sero puts his all into getting him across the finish line.
He alternates between licking and sucking on Bakugou's nipple without pause, frots against him at that perfect, tantalizing angle that makes Bakugou clench every time he feels Sero's rock hard bulge dragging across his entrance, emphasizes every thrust with a hard stroke up the length of his leaking cock.
"Fuck, Sero! Yes! Keep going, yes, yes—!"
The heat coils up tight in Bakugou's stomach and he squeezes his eyes shut, concentrating fully on chasing his orgasm. His heels drag across the sheets and his legs tense up like a line drawn taut. He's close, he just needs a little more, damn it, he's so fucking close—
The bathroom door bursts open and Kirishima comes barreling out.
"I'm done!"
"FUCK."
And just like that, the line gets cut and Bakugou collapses onto the bed with a frustrated yell.
"Ow ow ow— hair, hair—!" Sero cries, rolling off Bakugou as he's forced to follow his lethal grip, lest he winds up with a bleeding bald spot.
Bakugou lets him go and grabs his pillow instead, jaw clenched tight as his cock twitches angrily against his stomach, desperately seeking release.
"Whoa, what happened?" Kirishima asks, having witness the split second of concentrated chaos.
It takes a few deep, controlled breaths until the throbbing heat in Bakugou's gut simmers down and he's finally able to think clearly again.
And the second he can, he jolts upright, grabs every single pillow off the bed, and whips them one after another at a panicked Kirishima.
"HOW THE FUCK," WHACK, "IS YOUR TIMING," WHACK, "SO FUCKING," WHACK, "BAD!" WHACK WHACK WHACK.
"What?! What did I do?!" Kirishima cries, shielding himself against the plush bombardment.
The last pillow bounces off him harmlessly and hits the ground with a feeble fwump. Kirishima lowers his arms and sees Bakugou burning holes into him with a smoldering glare.
"Ah… Was it getting good?" He asks sheepishly.
"He was like, this close, dude," Sero says, holding his thumb and index finger just a fraction of an inch apart.
All traces of humour drop from Kirishima's face and he pales.
"Oh! Shit, I'm so sorry Bakugou!" He clambers onto the bed and takes Bakugou's hand despite his ever-present glare.
Bakugou rolls his eyes. "You couldn't wait two more fucking seconds for me to blow my load?"
"I didn't hear you over the hair dryer! I thought you guys were just chilling, otherwise I totally would've waited until you were done," Kirishima explains quickly. He plants an apologetic kiss on Bakugou's knuckles and looks up at him with eyes full of remorse. "I'm sorry."
Bakugou sighs. "It's fine." Because sure Spa Day is special, but he also isn't that hung up about its unwritten rules. "M'not gonna hold something against you that wasn't your fault."
"Still." Kirishima inches closer and takes his other hand, holding them both tenderly against his lips. "Let me make it up to you? Please?"
Bakugou opens his mouth to shut him down because for all that his temper has a tendency to spontaneously combust, it fades just as quickly, so rarely does he hold an actual grudge or have any desire for compensation.
Seeing Kirishima so eager to please gives him pause, however, and suddenly he's struck with an idea that's he can't possibly pass up on.
"Fine." He pulls his hands away and leans back on his arms, his lips twitching into a sharp grin. "You interrupt twice, you sit out twice."
"You mean I can't touch you?"
"For two rounds."
Kirishima balks. "But I wanna make you feel good!"
"You said you wanted to watch me cum," Bakugou nudges him off the bed with his foot and kicks him lightly towards the chair, "so go sit your ass down and watch."
Kirishima makes a choked sound. He turns to Sero for help, but Sero just holds his hands up to say I'm not getting involved. With no sense of self-preservation, Kirishima looks back at Bakugou and tries to make a final plea.
Bakugou shuts him down with a single glare. Kirishima quickly drops into the chair without another word of complaint.
"Can I at least touch myself?" He asks quietly, hands fidgeting in his lap.
Bakugou grabs a cock ring from the sex bag and tosses it to him. "Only to put this on."
Kirishima makes a protesting sound, but does as he's told. Sero rubs salt in the wound by looking him right in the eye as he sits up and hugs Bakugou from behind, hands slipping under his shirt and kissing along his neck.
Kirishima looks genuinely betrayed as he cries, "Dude, don't be mean!"
Sero stifles his laugh against Bakugou's shoulder. "This is fun, we should bully Kiri more often."
"We haven't even got to the fun part yet," Bakugou scoffs.
He wastes no time picking up where they left off. Bakugou lies on his back and pulls at Sero's waistband until he's positioned between his legs again. He pushes his shirt over his chest like before, arching slightly off the bed as he does to make it abundantly clear what he wants from Sero.
Sero gets the message loud and clear. He leans down to give Bakugou a deep, languid kiss first before returning to Bakugou's chest. His nipples are still red and swollen from before, and Sero's mouth waters at the sight.
"Can I just say first," he breathes, looking up at Bakugou with an enraptured smile, "that I really love Spa Day."
Bakugou smirks. "Yeah?"
"Mm."
"Then show me," Bakugou purrs, and his grin goes from delighted to positively wicked at the sound of Kirishima's desperate whining.
Now they're getting to the fun part.