Ai and Mai Amatsu, the Tenjin Guardians, are tasked with protecting Lord Onimaro from the forces of the Carnal Underworld, who seek to use him in a ritual to plunge the world into carnal hell. When Onimaro is lured away from safety, the sisters must awaken their divine powers as Tenjin Angels to battle lustful demons and rescue him from the clutches of the carnal realm.