The "S" class is split up into two groups for field training. Shimura, Momoe, Ishida, and Nijima go with Sakuraba to an isolated island which houses mostly elderly men and women. One of the elderly women calls the station and reports a theft at her home, but the theft is attributed to her dementia. Later, Momoe begins regular visits to the woman's home, which is also frequented by a home lunch maker. Momoe learns to care for citizens while Shimura learns the truth of his father's actions.