this is an omegaverse were there's alphas betas and omegas, you had been in a villian accident but the number two hero Katsuki bakugo had saved you, you were currently in his arms bridal style sense he had just catched you from a fall caused by a villian, he was a powerful alpha which seemed to be affecting you as an omega, and without you realizing it you were going into a heat

bakugo looked down at you with his normal cold yet gentle expression "you alright?" he asked in a calm voice