Synopsis

When an item known as the 'ultimate goal of all Bosses' appeared on a reincarnated monster, Mohai realized that he could transform into any Boss in the game.
The Endless Land, the Skeleton Sea, the Quantum Space, the Sky Castle, the Time Realm, the Primordial Ruins, the Underworld, and all the famous locations once ruled by the invincible Bosses would become his playground.