Um grupo de heróis propõe destruir Cleavatess, o rei das bestas. Mas eles se deparam com uma conspiração para destruir o mundo e devem contar com a ajuda de Cleavatess.

Akira Shiroyanagi, lover of games and candy, faces a mysterious girl named Mion one morning. She drags him into a strange game where the players gain special abilities. Akira aims to win using his new powers and intelligence.