The Demon of Soubu High

It had all ended in spectacular failure: the entire world had ended, and the one responsible for that was him. But in the last moments of the universe, he found a way to reset it. To give himself one more chance to save it. All he had to do, was start again from the beginning, in a world where everyone was special, and he wasn't. [AU, sci-fi, martial arts, eventual OP Hachiman]