A young human named Eiji, gained great sword skills, and as a result the title of "hero" has been bestowed upon him. However, the Sacred Sword, the only weapon that can defeat monsters, is being monopolized ...

Humanity freed itself from the rule of the demon king, Addiogue more than 200 years ago... but with the birth of a new demon king, Reudyunu, the world was swallowed in darkness once again. There is only one ...