It's Always Been You
Katsuki could barely believe this was happening. Izuku, the pretty omega he had known his entire life, whom he had gone from friends, to bully, to rivals, and back to friends with, was here in his arms. He couldn’t believe that this perfectly imperfect man, the one he had been pining for for as long as he could remember, had made a nest in his bed; had asked Bakugou Katsuki to stay with him during his heat, and was clinging to the muscular blond like his life depended on it.
There was no chance of him leaving now. He had a needy omega to please.