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

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.

Kotarou wakes up in a deserted town, and the only thing he knows is that he must talk to the girl on the hill.