Chapter Text
Kirishima was a typical Alpha. Big, Dumb, Horny, y’know, classic alpha.. What he wasn’t, however, was an asshole. In fact, he thought of himself as a normal, nice person. At least a nice enough person to be able to have an apartment with Bakugo Katsuki after graduation. And he stood by that. At least until today. It was one of his and Bakugo’s rare off days, and they had agreed to work out together in the morning before going about their regular off days. That morning, he had been a little late to get up, so Bakugo had decided to go ahead to the gym. Kirishima followed about ten minutes later. When he walks into the gym, the first thing he sees sets his blood alight.
Before he even enters the gym, he can smell the irritated burnt cinnamon of his best friend. Not really a good start. He feels his defenses go up when he walks in. And sure enough, as he locks eyes with the blond, he makes a note to rethink his whole ‘nice guy’ policy. Standing at the dumbells, he sees his best friend being accosted by two broad guys that Kirishima could only assume were alphas. It confused him slightly, but he assumed they could just be attracted to other alphas. He’s so lost in thought that he almost misses when one of them puts their hand on his shoulder, causing him to drop a dumbbell. Kirishima immediately rushes over, calling out to Bakugo. “Oy Bakugo! I told you not to get started on the reps without me.” He chuckles.
Bakugou visibly relaxes when Kirishima shows up, his scent calming down and no longer clogging up the gym. The two alphas look at him with grimaces. Katsuki turns to Kirishima after placing the dumbbell back on the rack. “I was warming up until these extras came over to distract me.” Kirishima eyes the two alphas, who are clearly getting uncomfortable now. One of them holds up his hands and chuckles. “Woah, well we weren’t- uh….” Kirishima’s glare deepens and they turn and walk away, quickly heading to the locker rooms.
Once they are officially out of sight, Kirishima sighs. “You good man? I could smell your scent from out there.” He points to the door. Bakugo flushes and reaches up to his throat, seeing he forgot to put on a scent patch. He groans. “Dammit! They came up to me when I walked in, must’ve forgotten it in my bag. Oi! Gimme one of yours.” He says. Upon Kirishima’s look of confusion, he groans. “Mine are in my bag…In my LOCKER. Plus yours are bigger, and by now my scent would probably bleed through mine.” He holds out his hand and Kiri nods, placing one of his scent patches into his hand.
Katsuki takes a moment to place it one, looking to Kirishima for a sign when his scent quickly dissipates due to the AC. Kirishima smiles and holds up his thumb. “All good Bro. You ready to continue the workout? I gotta do a few warmups but then we can get to our reps.” Bakugo nods to him as he goes back to grab another dumbbell. Kirishima grins and puts in one of his airpods, handing Bakugo one as he turns on their workout playlist. As they go about their workout session, Kirishima finds himself keeping an eye on Katsuki more. He tells himself that he is just making sure the two guys aren’t coming back, but when he finds his eyes drifting across his friend’s pecs and biceps, he realizes that it runs a bit deeper than that.
As they move into their actual workout, he notices Bakugou sweating a bit earlier and more than usual, and he even swears he can still smell Katsuki’s scent in the air. But only when Katsuki can’t seem to keep up does Kirishima get worried. Turning the music down, he slows down and looks at his friend. “Hey. Let’s cut it short today. You got here early so you’re basically already in the cooldown.” Katsuki huffs and grumbles. “Yea. Whatever. Try to be here on time next time. I’ll stop. But you need to keep going. You always skip out on the last workouts. I’m going to shower.” Kirishima pouts but continues his workout as Katsuki starts heading to the showers, doing a couple cooldown stretches.
Kirishima continues his workout as his playlist now plays in both ears. As he closes out with his cooldown routine, he sees a few people quickly exiting the locker room. As he puts his equipment back and starts taking out his earbuds, he hears the telltale bursts of Katsuki’s quirk going off. In seconds, he is tearing his way across the gym, pushing past the people now running out of the gym. Has a villain gotten into the gym? Why would they be in the locker room? A million thoughts are running through his brain as he enters the men’s locker room. Almost immediately, he feels his blood start boiling as he sees the cause of all the commotion.
Sitting in the middle of the locker room, Kirishima notices the two men he had seen flirting with Katsuki earlier. They have a number of bruises on their face and their clothes have burn marks, signaling Kirishima that they must have come across the fiery blond and decided to mess with him again. Seeing that they were tied up by what looked to be an extra pair of sweatpants, Kirishima starts looking for him. “Bakugo? What happened here? Where are you?” The redhead calls as he looks around the room. Eventually, he comes across the showers, where he spots the telltale blond spikes of his best friend. “There you are. Come on man, People are freaking out and-” He stops in his tracks when Bakugo turns to him, he still has his sweatpants on, but his skin is beet red and his eyes glow with blue rings. “Woah, Dude…” Kirishima says as he moves closer.
“What happened to you?”
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Fuck. Katsuki needed to get out of there. RIght FUCKING now. He wills himself to move, feet haphazardly sliding on the wet shower floor. Slowly, he walks past Kirishima, the alpha recoiling at the strength of Katsuki’s scent as he walks past. “Stupid Alphas. All of you. He used his quirk on me…some stupid enhancer quirk. Did it as I was changing to get a shower. I’m going to the apartment. So me a favor and take these fuckers to the police station.” The blond mutters to Kirishima. Before he has a chance to respond, Kirishima turns and notices Katsuki is gone. Weird.
The redhead hurriedly pulls out his phone, calling his friends at the police station to let them know he was bringing in two perpetrators on a “quirk incident,” charge. Thankfully, it seems Katsuki had managed to knock the two of them out, so getting them to the station was a relatively easy endeavor. Kirishima gives the police a rundown on the information he knows as they lock the two up. “Alright Red. Thanks for bringing them in. Make sure to let your partner know that we’ll need his statement once he is feeling better. You should probably go check on him. I’ll give you a call when they wake up and we get more information on their quirks.” Yorichi tells him, noticing Kirishima had begun to get restless the longer they took.
Kiri nods and picks up his and Katsuki’s duffel bags. “Thanks Yor. Please do. I’ll go check up on Dynamight and let him know what’s going on. Take care. And tell Tera I said hello.” He says, waving to Yorichi and the other police officers as he leaves. Walking out of the police station, Kirishima pulls out his phone and dials Aizawa. They may have graduated a few months prior, but there was something nagging at the back of Eijirou’s mind. And he presumed only the elder Alpha could help.
“Kirishima Eijirou… You must either be dead or dying to call me at this time on a Saturday during a school break. What do you need?” The teacher asks. Kirishima sighs in relief. “Sensei, Bakugo got hit with an enhancement quirk. Afterwards, I saw something that caught my eye. What does it mean when your eyes glow blue?” He hears a sharp intake of breath over the phone and his heart stops. “Kirishima. Is Bakugo with you right now?” Aizawa can almost hear the wheels turning in Kirishima’s brain as the redhead walks into his apartment building. “He headed back to the apartment. I’m walking in now. Why? Do you need to tal-'' Aizawa interrupts him. “Listen to me closely. DO NOT go into your apartment.” Kirishima chuckles softly. “Don’t worry sensei, I can handle Bakugo.” he counters.
“You don’t understand, Kirishima. When you all presented in high school, Bakugo asked for his presentation to remain hidden. An enhancement quirk is one of the worst things Bakugo Katsuki can be hit by. And you are one of the worst people to be near him right now.” Kirishima unlocks the front door and opens the door, almost dropping his phone and the bags when the undeniable smell of Angry, Possessive Omega hits him like a bus. It’s only then that he hears what Aizawa was trying to warn him about.
“Bakugou Katsuki is a Prime Omega.”