Ryuga Dogai returns to investigate a new mystery – the theft of Makai Knights armour. Among the victims are Ryuga’s old comrades from the Volcity crisis, Takeru and Aguri. The three will face off against an enemy previously though defeated – Zinga.

The story is loosely based on a 17th century erotic Chinese story named The Carnal Prayer Mat and follows a young scholar named Yangsheng who gets married to the beautiful daughter of a local merchant. When their sex life proves unsatisfactory, Yangsheng leaves home and journeys to the Pavilion of Ultimate Bliss.