Эта история о непростом периоде в жизни подростков, связанном с взрослением. Главными героями аниме станут ученики средней школы, занимающиеся софт-теннисом. Школьный клуб софт-тенниса находится на грани закрытия. Чтобы хоть как-то спасти клуб, Тома Синдзё просит Маки Кацураги присоединиться к команде, так как тот известен своими выдающимися способностями в этом виде спорта. Юным спортсменам есть к чему стремиться, ведь скоро состоятся летние соревнования. Тома пытается воодушевить Маки и разбудить в нём состязательный дух, а тот в ответ спрашивает, сколько Тома заплатит ему за вступление в команду.

Constantly outperformed by the girls' club, the boys' soft tennis club faces disbandment due to their poor skills and lack of positive results in matches. In desperate need of members, Touma Shinjou is looking to recruit capable players, but he fails to scout anyone. Enter Maki Katsuragi, a new transfer student who demonstrates great reflexes when he catches a stray cat in his classroom, instantly capturing Touma's attention. With his interest piqued, Touma ambitiously asks Maki to join the boys' team but is quickly rejected, as Maki doesn't wish to join any clubs. Touma refuses to back down and ends up persuading Maki—only under the condition that Touma will pay him for his participation and cover other club expenses.

Maki joins the team, and his incredible form and quick learning allow him to immediately outshine the rest of the team. Although this gives rise to conflict among the boys, Maki challenges and pushes his fellow team members to not only keep up with his seemingly natural talent, but also drive them to devote themselves to the game they once neglected.

As the members of the boys' soft tennis club discover their own capabilities, they endure personal hardships and deal with the darker side of growing up in middle school.

[Written by MAL Rewrite]