Soulmate AU where your soulmate's name appears on your body when you hit 18, and Kirishima is one of the last 3 people without his mark. He stays up all night, wondering if he'll get one on his wrist like Sero, or one on his cheek like Midioryia.
He doesn't know when Katsuki's birthday is, because the blonde refuses to say, but he's never seen his soulmark, so the blonde probably isn't 18 yet.

He kind of hopes his mark says Katsuki....

Kirishima spends all night waiting up and searching his body but no mark!!
Instantly, it all comes crashing down, the anticipation and the excitement and it balls into the worst day of his life.

He's got puffy eyes and he's exhausted the next day in class. He has a headache and barely listens to lessons and he really doesn't want to do training.
He's slow undressing and reluctantly slipping into his hero costume.

Bakugou's still in the locker room, too. He knows the blonde is trying to figure out what's wrong with him.

"You get your soulmate, Shitty hair?" He asks with concern. "Not who you fucking wanted??"
Bakugou's tone is tinted with upset, likely on Kirishima's behalf.

Kirishima shakes his head sadly. If only that were it! But no! He doesn't HAVE a soulmate!!
Bakugou slams his locker when Kirishima shakes his head. "Fuck you." He says sharply, shoving his hand into a gauntlet quickly so he can get out of the locker room.

Kirishima's face snaps to Katsuki's. Why is he mad?!
"Hey, bro! Wait!" Kirishima grapples Katsuki by the arm until he's standing in front of him. "It's not that I got a bad person! I just... I didn't get one." He admits with a pout. "Did... did you get yours on time? Maybe mine's late?"
"They're never late." Katsuki says with a roll of his eyes. "I got mine on time and so does literally everyone else."

Kirishima eyes widen. He's never seen Katsuki's soulmark! "Bro! Let me see! I won't tell anyone! Who is she? Do we know her??"
Kirishima insantly backpedals. "Them*! I mean do we know them*!" He says with tinted cheeks.

Katsuki rolls his eyes. "You're a dumbass, shitty hair. I'm going out." Katsuko stomps to the door of the locker rooms before he throws over his shoulder, "look in the mirror, dipshit."
Kirishima frowns, he's not wearing much right now, just his arm bracers and chest piece, he's completly naked on the bottom except for the jockstrap he's holding up against his crotch for cover while he and bakugou chat.

He turns his arms in the mirror, trying to see.
Nothing.
He turns a little at the waist, trying to see his broad shoulders and lower back. He even lifts his hair up.
Nothing.
Is Bakugou teasing him?

He turns his legs in the mirror.

Nothing.

He checks out his penis and balls, just incase!! (Nothing there either except a nice looking dick)
Frowning, Kirishima decides he's going to give Bakugou a piece of his mind. It's rude to trick people and honestly, his feelings are kind of hurt.
Kirishima bends down and grabs his red skirt piece. While he's bent down, he decides to give one last look between his legs and--

"Oh god!" Kirishima shouts excitedly, losing his balance as he tips forward, almost somersaulting off his feet.
He DOES have a soulmark!
Nestled underneath one of his asscheeks is a slightly cursive, "Katsuki Bakugou."

Oh GODS. HIS SOULMATE MARK!

With red cheeks, Eijirou doesn't know what's more embarassing. The fact that Katsuki saw the mark first, or that it was hidden in Ei's exploration because his fat ass.
Tripping to get dressed, Kirishima runs from the lockeroom to find Bakugou.

He can't wait to tell Katsuki that he's found his soulmark!

:)
You can follow @Ruingreystreak.
Tip: mention @twtextapp on a Twitter thread with the keyword “unroll” to get a link to it.

Latest Threads Unrolled: