As Koguma slowly adjusts to life with her Cub, she mentions to Reiko that her luggage case seems convenient, so Reiko makes a call. After school, the pair visit a credit union, where the manager has an old Cub with a luggage case available to them.

With summer vacation approaching, Koguma plans to spend it working for the school, shuttling papers back and forth to a high school in Kofu. Along the way, she finds herself learning more about maintaining her Cub, and the perils of inclement weather.

The night before the class excursion to Kamakura, Koguma comes down with a fever, and must cancel. The next morning, after her fever is gone, she makes the bold decision to hop on her Cub and set out on the long journey to catch up to her class.

Koguma rushes to the narrow dirt road on her Cub to find Shii, who is half-submerged in a freezing river. She takes her back to her apartment to warm her up and dry her out, but Shii soon reveals that she has other, deeper issues with the winter weather.