One day during one of Izuku's middle school days, a new student transfer named Rinwell gets along with him and they become great friends together. Suddenly on that same day, a villain attacks and an unknown power awakens from within Izuku that is going to make him into a great hero to make the world free. The power of the Sovereign! Izuku x Harem. Lemon. No One for All for Izuku.

The candle of a life burnt and extinguished. That should have been the end. And yet at the end of the universe, being spirited away to a world far removed from his reality, one soul finds a new hunting ground. Bereft of allies and acquaintances, he carries on regardless, seeking a new purpose.

The group received a transmission from Dohalim about some problems with the Lenegis' combat simulator. However, upon inspection, they end up in a fight they were never expecting to do.

While gathering forces for the upcoming confrontation against Kaido, the heroes soon find themselves in a world overrun with subjugated rule. Now they must team up with a man with no memories as they take back this world, one region at a time.