TOUGEN ANKI

Shiki Ichinose is attacked by an unknown assailant, fleeing with his adoptive father. He learns he's actually a descendant of the "Oni," and a target of the "Momotaro Agency." Unable to accept this.

Shiki awakes to find himself before Oni Agency member Naito Mudano, who evaluates Shiki's potential as a valuable addition to the organization.

Mudano splits the new students into teams before the strange game of tag begins, but Shiki soon gets into a fight with his teammate Jin Kougasaki.

Shiki collapses after overexerting himself during his fight with the titan; unconcerned about his teammates, Kougasaki attempts to take down Mudano.

Mudano takes the team on a trip to help the Kyoto base. The Momotaro Agency's Tsubakiri Momomiya and Yomogi Momokusa launched an attack on the Oni, leaving dozens of wounded. Mudano entrusts the students to Commander Oiranzaka, heading to battle.