Bundled with the seventh and ninth volumes of the manga.

The story revolves around high school girls who discover the appeal of motorcycles. Sakura Hane is a high school student who looks a little bit like an airhead. On the way to her all-female high school one day, she is worn-out climbing a hilly road with a bicycle, but she sees a girl named Onsa Amano who is riding a motorcycle. Sakura immediately becomes interested in motorcycles, and she and Onsa join the motorcycle club at the school. Then, Sakura sets out to get her license.

[Source: Anime News Network]