Midsummer, Ogasawara Islands, Chichijima. Members of the 8th Guards Division are running in the schoolyard where the heat haze rises. Sakuma, who skipped training, finds the mysterious squirrel "Shimashima" while escaping from his teacher Osako. Meanwhile, Eitaro Nagano, who played an active part in the Kumamoto annihilation strategy on New Year's Eve, appears. Nagano says that he has come to see Ishizuka, the commander of the 8th Guards Division, but...