The adventures of a Demon King who awakens 500 years after his defeat in a futuristic world.

After the great war ended with humanity's victory, the world suddenly gets "overwritten" right before the eyes of a boy named Kai.

A man working a job far removed from his childhood dreams gets wrapped up in an unexpected situation...!. Becoming a monster, he aims once again to fulfill his lifelong dream...!.

Zagan is feared by the masses as an evil sorcerer. Both socially awkward and foulmouthed, he spends his days studying sorcery while beating down any trespassers within his domain.