A perfectly ordinary, unremarkable boy was suddenly summoned to another world one day.

—as the Demon Lord.

In this other world, the boy confronts a Hero who, like himself, was summoned, unknowingly embarking on a cursed destiny.

The boy becomes the Demon Lord, transforming into nothing more than an instrument whose sole purpose is to defeat Heroes within his castle. Death eludes him, and he wastes his days in futility.

Then one day, a girl appears before the Demon Lord.

The Demon Lord, unwillingly immortal.

A naive, failed Hero.

The moment they meet, the story, once halted, begins to be spun anew.