Sawako Hayakawa works as a manga writer. Her husband of five years, Toshio, is also a manga writer. On a summer day, Sawako begins to write her new manga, which deals with adultery. The manga describes Toshio having an affair with her editor and Sawako having an affair with her driving instructor. Toshio reads Sawako's manga with fear and jealousy.
Manga-ka (manga author) Sawako suspects that her husband is having an affair. Instead of confronting him directly, she finds a more creative way to drop the hint.