The city of afforestation, Kazamatsuri. In this city which promotes the coexistence of culture and greenery, Tennouji Kotarou is tormented by supernatural phenomena night after night...

Kotarou is unable to get in touch with Akane, Chihaya, Lucia, Shizuru, or Kotori after the incident in the forest. It is then that a girl appears before him.

Kotarou reunites with Kotori, and learns her and Kagari's secret. Meanwhile, someone breaks through the barrier and infiltrates Kotori's secret base.