The story is set in a world of swords and sorcery called Earthqualia, where everyone is born with a designated "class" or role. The story centers on Koji Kagami, born into the weakest "villager" class, but is level 999 despite that. Koji has a chance meeting with Alcie, the daughter of the demon lord, and together, they seek to find a way for humans and demons to co-exist.
