When Koguma lets it slip in class that she owns a motorbike, she attracts the attention of Reiko, one of the girls who sits near her. Reiko insists on seeing Koguma's Cub, as well as showing off her own, and is pleased to meet a fellow Cub rider.

With the colder weather taking its toll, Shii comes up with a way to provide both Koguma and Reiko with a little relief. But when the temperature dips even lower, the pair are faced with adopting measures for their Cubs that they are reluctant to accept.

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.