 The first book in the series opens in Taishō 14 (1925), introducing Koume, who is the 14-year-old daughter of a yōshoku restaurant owner, and a student at a local girls' academy.One day, Koume's friend, Akiko, asks her to join in an all-girl baseball team and have a match against a boys team.While the first volume can be read as a stand-alone work, the second volume develops the storyline further.