Teenager Shiki is attacked by a mysterious man. As his foster father Tsuyoshi helps him flee, he learns of his surprising and legendary heritage.

Shiki wakes up confused in front of Naito, who explains the situation with the Oni and the Momotaro.

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

Shiki manages to trigger Blood Eclipse Release, bringing down the Blood Titan, but he collapses after draining too much blood. Meanwhile, Jin ignores the fallen Shiki and Homare, and charges straight at Mudano.

Mudano takes the team on a trip to help the Kyoto base, when Momotaro Agency's Tsubakiri Momomiya and Yomogi Momokusa launch an attack on the Oni. Mudano entrusts the students to Commander Oiranzaka and joins the battle.

The Oni bodies are seeded with Tsubakiri's bacteria. Reanimated by his power, the corpses turn on their former comrades. With the non-combat support staff and the wounded unable to fight back, the Kyoto base is pushed to the brink of collapse.