Who is Katz Baldwin?

A wandering healer? A rogue sorcerer? A quiet hero in a dying world?

No one knows.

But here’s the truth: he’s the 36th Demon King — the weakest in history. A joke. A failure.

Except… he inherited the forbidden shadow power of the First Demon King — the God Slayer.

For 2,000 years, demons and humans have been at war.

Katz crossed into enemy territory alone — not to conquer, but to heal.

A deadly plague is sweeping the continent, and instead of destruction… he’s saving lives.

Now they call him a hero.

But how long can a Demon King pretend to be a savior?

When the truth surfaces, the world will have to decide:

Is he their salvation… or their doom?