I Made a Bet with the Devil, Promising You a Life Without Suffering.

Heaven, under the World Tree. An old man plays chess with a young man. "Have you ever accomplished what you set out to do?" "Never." "If you bet with the gods, why not bet with the devil?" So. There is a bug in the world where the power of gods and demons coexist in the human body. The owner of the apartment in the afterlife, the ninth demon king of hell, the king of hell in the underworld, and the father of the underworld. Titles hung on his head. Nine Sons Ghost Mother? A thunder. Red wedding dress? A fire. The city was full of fierce ghosts, shivering. They have only one wish, and that is to enter the underworld safely. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.