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.

With the arrival of autumn, Koguma and Reiko's attention turns to getting ready for winter. When the class culture festival committee runs into a snag getting what they need for their activity, the pair volunteer to use their Cubs to come to the rescue.