I Prepared For The Wrong Ending

Noir's preparation plan to face the apocalypse was utterly crushed after finding out that what came at the end of the world wasn't the event he had expected but a strange phenomenon that made everyone disappear. He and the other six survivors had to live in the abandoned world for 11 months until a second phenomenon appeared again and eliminated the rest of the living. Surprisingly, instead of being sent to oblivion, he was awakened in the body of a boy with the same name as him. In this new life, Noir decided to become an observer instead of a leader since everyone here had superpowers. Surely, nothing could happen to this world if everyone was that strong, right?