A Rurouni named Kenshin has an encounter with Kaoru, who accuses him of being Battousai The Manslayer who has been trying to tarnish the good name of her father's sword style that is only supposed to save and protect people.

After being gifted powers by japan's number one pro hero all might, izuku midoriya has to learn what it truly means to be a hero as his entire life is flipped upside down as the league of villains make him a target for some unknown reason.