

Ethan Lyons, the retired Human Saint King, secluded himself in the city and opened the Sunset Retirement Home. In this place, the powerful demon gods, who regarded all living beings as nonentities, were tamed and turned into a janitor,a guard dog, and a boiler worker. Amidst laughter and joy, he succeeded in saving the world.

Taking the fall for his brother, Tyler spent 5 years in prison, secretly rising to become the King of the global underworld. Returning home to share his empire, he is instead cruelly disowned by his brother and betrayed by his cheating fiancée. Unaware they just provoked the final boss, Tyler unleashes his absolute revenge.