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 meets the academy witch, Senri Akane, and joins the occult research club. He starts taking part in occult club activities and gathering club members in order to prove that supernatural phenomena exist.

The occult research club finally begins regular activities. For their first investigation, they search for a tsuchinoko.

Kotarou searches for the elderly gentleman he met to ask him about unidentified mysterious animals.

One day, a letter regarding "Asahi Haruka" arrives at the Occult Research Club, and Kotarou immediately begins an investigation.

With Chihaya and Lucia's disagreement resolved, the occult club resumes activities.

Five days after losing contact with Inoue, Akane suddenly announces that occult club activities have been suspended.

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 brings Kagari to the city to help her "find herself" after she gets amnesia.

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

Chihaya heads to Sakuya's location on Akane's orders. While she is wandering through the forest looking for Kotori's secret base, she discovers a certain person who has collapsed.

As the song of destruction echoes across the skies, monsters appear and nature runs amok, destroying the world. Meanwhile, the gang rejoices at Kagari's returning to her senses, but that's when Esaka shows up...