Masanori Takeuchi

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.

A quiet woman receives a social media request from a middle-school friend, who she doesn’t remember fondly. The two meet at a hotel’s restaurant where they find a room numbered 666 containing Rokuroku, a long-neck woman wearing a red kimono.