The series is set in the Mukawa area of Hokuto in Yamanashi Prefecture, Japan. The story follows Koguma, a lone, gruff girl with no hobbies or interests. After an encounter with a Honda Super Cub 50, she begins to grow and her world expands beyond herself. The novel promotional posters and the official novel site promote the commemoration of 100 million units sold for the Honda Super Cub.

Plot:
The main character is Koguma, a girl without parents, hobbies, or friends. While riding her city bike to school one day, Koguma decides she'd like to get a motorized bike of some sort. She then resolves to get a Honda Super Cub from a local dealer. Because of this, she eventually makes friends with Reiko and Eniwa.

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