

Leo, the young heir of a powerful family, was framed by his first love and thrown into prison. After that, except for his aunt, his entire family died tragically in an "accident", and his legacy was seized by his ex-girlfriend, Jenny. While Leo was in prison, he mastered various skills, from antique collection to medical treatment. Invincible as Leo was after he was released, Leo protected his last family, dominated the city, and started his revenge...

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.