To bring back her dead friends, high school student Naomi (Rina Ikoma) goes back to the elementary school where a tragedy took place. She becomes involved in a new incident.

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.