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.

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...

As Kagari's research continues to take its toll on her, Kotarou looks to help her out and realizes the true significance of her theory of life.

Back in Japan, Kotarou finds himself in Kazamatsuri once again, where he meets quite a few familiar faces.