Nagara, Nozomi, Asakaze, and Rajdhani continue searching for new worlds. Students start going missing, and their bodies are found "frozen" into black shells, so Pony asks Mizuho to look into the matter. Mizuho reveals a surprise about her power to Nagara.

While traveling the wilderness, Mizuho asks Yamabiko how he became a dog. Yamabiko then relates how, 5000 years ago, he wandered different worlds all alone, until meeting a girl to whom he gradually opened his heart. But their happiness was short-lived.