At your sixteenth birthday, you didn’t only get your soul mark, but also did you present as either an Alpha, beta, or an omega.
Shouto, izuku, katsuki, shinsou and denki were soulmates. It was clear, because each and every of them had the same, small blue soul mark in their wrist, everyone but denki; who’s birthday was today, the last one to be presenting.
It was clear he would have the same mark, because they all loved each other, and there was no doubting that denki would be their soulmate, too. Even though the youngest knew that too, he had still been anxious.
his pack had all presented as either alphas or betas. Katsuki was an alpha, the leader of the pack. Shouto was a beta, izuku was a beta too, and shinsou was an alpha, so while everyone was sure he’d be a beta too, denki was scared. Scared he wouldn’t be a beta, scared he wouldn’t even get the same mark
but all those thoughts vanished once the boy laid in his bed the morning of his birthday, feeling a wet tongue on his wrist, right where the mark and his newly formed scent gland was.
Shinsou: “Fuck.., you smell so good..”
another sensation was added when he felt someone nuzzle his neck, lips ghosting over the shell of his ear, voice low and gruff
Katsuki: “mmhh..morning birthday boy..”
and that’s when denki felt the wetness between his legs. He wasn’t only their soulmate, he was an omega.