After fleeing from Charioce XVII's ball, Nina and the others are pursued by the Onyx Knights, who make an attempt on their lives. Mugaro acts together with Azazel, and Jeanne encourages him to return to the land of the gods.
10 years after the event, humans at the royal capital gather wealth, the demons are enslaved to assist with the capital's revival, and the gods lose their power due to a decrease in religious piety. The world is thrown off balance as humans, gods, and demons hold their own ideas of justice.