The children try to find Kako without success, until Chizuru "Chizu" Honda discovers where he is hiding and tries to cheer him up. However, Kako has other plans for her.

The story of Chizu's relationship with her teacher is revealed, before she is selected to replace the deceased Kako.

The human armies decide to intervene during the thirteenth battle, while Machi betrays Dung Beetle and becomes the next pilot in Kana's place.