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.

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.

Kagari begins to act strangely. Elsewhere, Midou shows up with his Earth Dragon and destroys the barrier around where Kotarou's group is staying.

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...

The story returns to when Kotarou was a superhuman without a cause, the Earth-Saving Hunter.

In order to save Kagari, Kotarou faces off with Gaia and Guardian.

In order to rewrite Kagari’s fate, Kotarou heads toward the final battle.