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Zip It, Shitty Hair

Summary:

When Kirishima and Bakugou finally get together, all their friends want to know how it exactly happened.

Unfortunately for them, it’s one secret they’ll never tell.

***

Late post for Krbk Month 2025’s prompt “Stuck together”

Work Text:

Eijirou loves everyone. His friends, most of all.

Right now though, he thinks they've got a little too much time in their hands. Or maybe the dorms and everything they've gone through together has brought out the worst co-dependent tendencies in them. It's brought out the vilest form of clinginess, of wanting to know every-little-fucking-thing about each other.

Now, it's bringing out the worst in him, too. Because why is it that Denki's just a bit curious and is probably being reasonable about it, but all Eijirou could think of is landing an elbow to his jaw?

This is how villains are made.

The common room is quiet, with most of the class having retreated to their own spaces, some still in the baths for a late night soak.

Eijirou’s still clearing his mind, willing the headache from doing too much maths to go away. If only he could have a little moment of peace.

"Come on, man. You used to never keep anything from us," Denki prods again. He sits on the couch, leaning forward, clasping his hands together. His eyes shine with anticipation, his knee bounces, and he's smiling while biting his lower lip.

Eijirou drops his head on the couch, slouching down. "I already told you. Lay off, dude."

"Somehow, I still don't believe you."

He needs a stressball. Or a football to bounce on Denki's head. Sighing, he says, "It just happened. I don't know what else to tell you. I like him, he likes me, end of story. Why are you guys suddenly so obsessed with this?"

"Honey." Mina comes in, cup of tea in hand. Great. As if Denki needs reinforcement. "We've been obsessed with this since first year, in case you haven't noticed."

She sits then, one leg tucked under her butt. She stares at him with that all-knowing smile that Eijirou's got memorized like the back of his hand.

Denki leans further forward, his teeth putting more pressure against his skin.

They're never gonna let this go, aren't they?

"Okay." Eijirou clears his throat. 

The two at the opposite end of the room hold their breaths, inching forward. 

"We were at the gym. Sparring late at night… and uh. You know the rest."

"No, we don't know the rest," says Mina.

"Details! We need details!" Denki falls back on the couch, doing some dramatic gesture with his hands. "You don't know how long we've waited for this, dude."

"Uh- okay." He rubs his nape. "So we were sparring and uh- I guess. Haha. I guess all that tension between us bubbled over."

"Awww." Mina clenches her chest with her free hand. "God, I love this friends-to-lovers stuff."

"Yeah." Eijirou loosens his collar, gulping. "So I got him pinned down."

"And?" Denki's eyes gleams.

"And I couldn't help it anymore, so. Ha. I- uh- kissed him."

"And that was it?" Mina asks. She places the teacup down the center table. "No confession or anything?"

"Yeah," Eijirou answers. "I know you guys are expecting, like, a big thing. Something grand. But yeah, that's about it."

“Kinda expecting a long speech, honestly,” Mina says. “You two have been dancing around your feelings for almost three whole years and you’re telling us one late night sparring session changed all that?”

“Yeah, something’s not adding up. You two always sparred. Why now? What changed?” Tapping his chin with a finger, Denki's brows furrow. "And what did Kacchan say?"

"Nothing!" Eijirou answers, rushed. "He just kissed back."

"And how was the kiss?"

"Tender," he says. "He cupped my head and all."

"And this was at the gym?"

"Yes, like I said."

"Were there other people there?" Denki asks.

"No, like I said, it was just us."

"When was this?"

Eijirou looks up at the ceiling. "Uhhh…"

"Mina, there's hesitation. Why is he hesitating?" Denki tries to whisper. 

She nods and hums. Turning her attention back to Eijirou, she says, "Why are you lying to us?"

"Why are you so invested in this?" His voice pitches. Oops.

"Aha!" Denki points at him, standing up. "I knew that wasn't the real story!"

Mina does the same, one eyebrow raised. "Eijirou Kirishima, you bastard!"

"Guys," Eijirou drawls. "I don't know what else to tell you. For the love of god, why don't you just take things at face value?"

Denki has a hand on his hip, the other one still pointing an accusatory finger at him. "Because you say shit like that. I don't know why you just can't tell us, but we'll find out soon!"

"You guys are on crack," he says. This has been going on too long. He lets himself sag on the couch, taking a deep breath, before he kicks his feet to stand up. "I'm gonna head upstairs. Katsuki's gonna be pissed if I stay up too late."

"Kirishima Eijirou!" The frustration in Mina's voice follows him. "You can't keep running from this."

He cackles. This is ridiculous. Since he and Katsuki had walked hand-in-hand to the classroom one morning, their friends had not learned the art of letting go.

How he and Katsuki actually, finally, got together is a mystery that the class has decided they need to uncover. While Eijirou is someone who wants to share any piece of happy information to them, this story is one that he and Katsuki have decided to take to their graves.

"Escaping will just make us want to find out about this more!" Denki yells.

He waves them off without looking back, hoping neither of them trudge behind him.

Thankfully, they don't.

Reaching the fourth floor, he pushes the door to Katsuki's dorm to find him already in bed, still awake, and reading one of the mangas he's been obsessing over lately.

"Hey." Katsuki puts the book down. "The idiots still pestering you?"

Eijirou walks over to him, kissing his temple before sitting at the edge of the bed. "Yeah. They won't stop. Why don't we just tell them?"

A knuckle grazes his shoulder. "You do that and I will break up with you."

He chuckles. "I don't know what else to tell them. They just won't believe me. How do you deal with this?"

Katsuki shrugs. "Easy. I tell anyone who asks to die."

Eijirou snorts. "Imagine if I do that."

Licking his lip, Katsuki tilts his head. "Hot. Can you do that?"

"I don't think it'll be very believable for me to tell other people to die."

"No," Katsuki answers. "Me. Do me. Tell me to die."

"The hell dude? I can't do that, considering uh–"

Katsuki rolls his eyes. "You die one time and suddenly your boyfriend doesn't wanna threaten you." He plops down, crossing his arms. "Fine. Just- do that thing with your face and your eyes and then threaten me."

He's so cute. How can Eijirou say no to that pout? "Okay."

He hardens his face, exerting all effort to give Katsuki what he wants. He crawls up, crowding Katsuki, unbreakable face and the closest thing to a murderous gaze lingering from his eyes. "I'm gonna fuck you up."

It takes a lot not to laugh, but Katsuki's blushing, smiling all silly and cute at him. "And then what else?"

"Hmmm." Eijirou scoots closer. "Gonna rip your shirt."

"Ohh.. Oh no, don't do that, Mr. Unbreakable, sir." How Katsuki's able to say that with a plain face while also failing to hide his excitement is a feat worth studying. 

"Don't tell me what to do!" His hand lands on Katsuki's headboard, claws splitting the wood. Shit. That isn't part of the plan.

It's hard to think about the headboard conundrum when Katsuki's blush deepens, looking at him with starry eyes, though.

"Oh my god," Katsuki groans. Vexation is absent in his voice. All that there is is honeyed desire. "I'm so fucking hard right now."

"Yeah?" Eijirou grins. "Well, I'm harder. I'm literally unbreakable."

"Crap." Katsuki frowns. "Why did you have to run with that stupid joke? Your mouth always ruins the moment." He knocks Eijirou's shoulder with his palm. Standing up and getting off the bed, Katsuki leaves Eijirou there with a half-chub and a quirk activation that's starting to wear off. Katsuki mutters, stupid fucking mouth and ill-timed jokes, now I'm soft again and I really wanted to– as he walks to his ensuite.

Offended, Eijirou yells after Katsuki's retreating back, "If it wasn't for my stupid mouth, we wouldn't even be together!"

***

Three years with them and Eijirou still doesn't understand the deal between Katsuki and Izuku. They’ve repaired their relationship, sure. It still remains that whenever they interact, Katsuki consistently wears an exasperated face, whereas Eijirou still couldn't tell if Izuku's flinching or if that's just his default talking-with-Bakugou face.

In any case, those two can't live without the other. Sometimes, Eijirou wonders if Katsuki will start inviting Izuku to watch them while yelling at him to die the entire time, saying shit like how he can't fuck better than Katsuki.

Yeah, it's– some weird shit Eijirou's learned to live with. He's being hyperbolic, but if it actually happens, he wouldn't be surprised.

It wouldn't come as a surprise either if Izuku whips out his notebook and obsesses over every grunt, every maneuver, every— what the hell is he thinking?

Eijirou stops his imagination from getting too wild. (Discovering he has an undiscovered propensity for exhibitionism is not on his bingo card.)

He tempers all the thoughts and quietly watches the exchange unfold while pretending to look for snacks in the cupboards.

Izuku is quiet, too, pinching his lip. His face is blank, but Eijirou could tell that his mind is racing. His food and chopsticks lay forgotten on the table.

"It wasn't after Kamino," Izuku says under his breath. "I really thought it would have happened sooner."

"It didn't. I got my priorities straight," says Katsuki. "Oi," he calls out, snapping Izuku out of his too-many-thoughts induced trance. "You better not have a timeline."

Izuku’s lips twitch, holding back a smile. “Hypothetically, if I did, it would only be because your dynamic is, uh, strategically important to team morale.” He grins then.

Eijirou can’t help it. He laughs, and suddenly two pairs of eyes whip toward him. “What?” he asks, dropping his hands from the cupboard handles. “It is kinda cute that you guys care so much.”

“Not cute,” Katsuki warns. “Annoying.”

“Cute,” Eijirou repeats, because he enjoys living on the edge. He walks over to them and stands behind where Katsuki's sitting. “Did he tell you about how he kissed me after sparring?”

Izuku nods. “I still can’t believe you two are finally together.” A smile colors his face.

“This one,” Eijirou jabs Katsuki with his thumb, “just can’t stand being pinned down.”

Without looking, Eijirou senses the tension from Katsuki’s shoulder. “Did you forget,” Katsuki grits his teeth, “that I was the one who had you pinned down.”

Swallowing nothing, Eijirou’s eyes dart around. “Oh yeah, haha. Guess my memory’s kinda muddy.”

“I knew it!”

Where the heck did Denki come from?

“You two are lying!”

Shit. Mina, too?

"It couldn't have been it." Oh great, Hanta's on their case too.

"You, you, you, you-" Katsuki's finger wags at all four of them. "Die." The chair scrapes against the floor when he stands to grab Eijirou's hand. "We're out of here," he says, dragging Eijirou out of the kitchen.

"Die? Me too?" Izuku repeats. "What the hell did I do?"

"Hey, no fair!" Denki calls after them. "We need the tea!"

"You know we'd only stop once we find out!" Mina says.

"Stop acting like you stand a chance against Mina," says Hanta. "It's your fault. Why are you acting so sketchy around the topic?"

"Yeah!" Mina agrees. "We've got Tohru, Kyouka, and Mezo on our side. You can't run from us!"

"Guess what we're doing," says Katsuki as he walks out with Eijirou in tow. He doesn't look back.

Eijirou, feeling a bit sassy (and bitter and hungry – can't have a meal around here without getting interrogated. Jeez.), waves at them as he grins with all the smugness he could muster. "Byeee."

"Hey, come back here!"

***

"If you crack, I will withhold sex for one month."

"Katsuki, you can't even last a day without kissing me." He beams, a little too arrogant for a guy who will definitely crack.

***

The class’s bewilderment on the mystery of how they got together has not run its course yet, though it's slowly dying, like a fish out of the water and left under the sun for too long. One moment, it’s quiet. The next, someone’s running their mouth.

Eijirou begins smiling again without worry flooding his brain. He swears, his tongue has swelled from all the lying he's been doing lately. The incessant questions that buzz overhead, plus the pressure from Katsuki to keep everything under wraps is costing him his sanity.

(He had whispered the secret to a tree, one time. He couldn’t hold it in anymore!)

But now, the dorm's close to getting back to normal, and Mina, Denki, and the rest of the crew have their eyes set on Kuroiro and Komori of Class B, or whatever other rumors run on campus. Katsuki did tell him that it'll only be a few weeks before their friends move on to another "scandal."

Relief fills Eijirou's lungs. 

It’s Saturday night and everyone’s gathered in the common room, sprawled on the floor and the couches, eyes glued to some mindless action movie Denki picked out. Mina and the other girls are munching on popcorn instead of grilling him for answers. Hanta’s actually focused on the screen. Even Izuku, who still throws him these little thoughtful looks sometimes, is busy scribbling something in his notebook about battle formations.

Katsuki takes his time getting here, but the moment he walks in, he settles right beside Eijirou and gently takes his hand. It’s the most effortless, natural thing in the world. Eijirou's heart skips, finding its rhythm. He doesn't know why it took them almost three years to finally be together, and in the most bizarre, we-can't-tell-our-kids-about-this way, at that. But after everything, after all the waiting, pining, and stolen glances, here they are.

They sit close, fingers intertwined while sharing this perfect moment. 

Eijirou is at home.

Of course, peace can only last for so long.

Ochako sighs, dreamy, her eyes soft and drooping. "I can't believe Bakugou got a boyfriend before I did. How the hell did that even happen?"

When it comes to things like this, Mina is on high alert. She pauses midway through a handful of popcorn, small crumbs littering her chin and mouth. "Ah, yes, we're back to that."

Hanta groans. “This again? Come on guys, I thought you've given that a rest. We won't get anything out of these two meatheads.”

"The hell did you call me?"

Eijirou grounds Katsuki by tugging at his hand and frowning at him, mouthing, "Don't let things escalate." He drops a bowl of popcorn onto Katsuki's lap, and Katsuki begrudgingly takes a handful, shoving it in his mouth.

Before Eijirou can thank Hanta for trying to keep the peace, and before he can breathe in the minute solace, Shouto speaks up.

"That's odd," Shouto says, "You guys don't know?"

All heads flick to him, shaking from left to right and back again.

"Bakugou told me," he says. "But I understand why he trusts only me. After all, we're besties."

"What?" Katsuki grits. "Besties your ass."

"Bro, they told everyone, but we're not buying any of that," says Denki. "The versions change each time we ask."

"Well," answers Shouto, "they are bad liars." He turns to Katsuki and Eijirou then. "Should I tell them what Bakugou told me? You guys look miserable every time someone asks."

"I will kick your–"

Eijirou grips Katsuki's shoulder as Katsuki begins to stand up. "The more we ignore it, the more they'll lose interest."

"Get your hand off me, Shitty Hair-"

He frowns. "Katsuki…"

"Fine." Katsuki throws his hand in the air, then sits down. "What the hell are you gonna say, you half-and-half bastard?"

"What you told me," Shouto answers. He looks to the others again. "Do you wanna hear it?"

The movie is on pause, with the remote hanging limp in Denki's hand. "Sure, why the hell not. Let’s get this over with. I just wanna watch this movie." He taps his foot.

"Do you guys remember that time when there was a scheduled power outage and we were all permitted to leave campus?"

At that moment, Eijirou's mouth begins to dry. "Katsuki…" he whispers.

Whispering back, Katsuki answers, "You stopped me, didn't you? Live with the consequences of your actions."

“I thought you made something up. Why does this sound too familar?” His hand tightens around Katsuki's. "You actually told him?" It's hard to talk while trying to be covert, but it's harder to keep it all inside while his heart is going bonkers against his rib cage.

"Shut up."

"Well, Bakugou told me that he and Kirishima stayed back because he," he looks at Katsuki, "wanted some peace and quiet."

"Typical," quips Hanta. "This sounds different than what we’ve been told. I like it. Keep going."

Shouto nods.

Eijirou's hand instinctively hardens once he feels small sparks from Katsuki's palm. “Katsuki, do something.”

“Just roll with it,” Katsuki answers. He says that, but Eijirou sees bullets of sweat on his forehead.

"The dorms were mostly empty, and they'd bought snacks and all, carrying them back to Kirishima's room. Kirishima was carrying bags, Bakugou had the drinks in both hands. But then…"

"What? What? What?" It's hard to tell because you can’t see her, but the cushion bounces, which means that Tohru's bouncing in her seat.

Shouto takes a deep breath. Exhales, quite dramatically. "Kirishima pointed out that Bakugou's fly was open."

Momo tilts her head. "His fly?"

"Uh huh," Shouto answers. 

Eijirou fidgets in his seat, but he's trying very hard to calm himself down. The elbow against his rib, though painful, helps a little.

"Be cool," says Katsuki.

"Do you always walk around with your fly open, Kacchan?" Izuku asks. "This is the second time I've heard about your fly being open…"

"I will murder you."

"Hey," Shouto calls. "Back to the story."

"Yeah, I wanna see where this is going," says Denki.

"Kirishima offered to zip Bakugou's pants. The power went out while his hand was on Bakugou's crotch. They were stuck in the elevator for a while." Though the room is illuminated only by the light from the television, Shouto's blush is visible. "Things escalated, and it ended with Kirishima giving Bakugou a blowjob."

Denki nearly chokes. “Wait, what?”

Cue stunned silence.

Eijirou can't look anyone in the eye. He actually wishes some villain would attack right now. He'd offer himself to them if it means he can get out of the situation.

Izuku repeats, "Blackout blowjob?"

"In the elevator?" Ochako's eyes run in circles.

"Bakugou Katsuki?" Kyouka echoes everyone's sentiments.

Can someone stab him, please? This isn't real. Chuckling awkwardly, Eijirou begins, "Guys, look–"

But Katsuki stands up, clapping his hands. He guffaws. "Good story, Todoroki. Real fucking good." He laughs harder, clutching his belly.

There's a beat of awkward tension in the air, but then Hanta wheezes. "I love you, bro, but that's the dumbest story I've ever heard."

Someone else snorts, and soon the entire room bursts out laughing.

"But- but- Bakugou told me that–"

"Dude, these guys? You can't trust them," says Denki. "They're so weird about this whole thing."

"Bakugou?" Shouto turns to Katsuki. "You lied to me? Your best friend?"

Eijirou feels bad for the guy, and he almost breaks. Katsuki, on the other hand, is already signaling for him to stand up, too. "You guys are all idiots," he says. "Come on, Ei. Let's hole up in my room. Maybe I'll give you a real blackout blowjob."

Collective protests and groans sound from the room, and Eijirou bows to them in apology for his boyfriend's crassness, though he himself can't stop laughing.

Soon, he and Katsuki leave their friends and once they're inside the elevator, he punches Katsuki's shoulder lightly. “You cracked,” he teases. "I can't believe you actually told Shouto."

He's answered with some noncommittal gesture. Katsuki's still grinning from ear to ear. "It's been eating me up. I had to tell someone. And would anyone believe the fucking Icy Hot Bastard?"