Ryuji Kuroki, a.k.a. Kurokan, is the manager of the Kirino High School baseball team. Kurokan has turned the struggling Kirino High School baseball team into a powerhouse in the prefecture, but the team's reputation is in shambles, and the team's sponsors are calling for the manager's resignation. While they are doing that, Kurokan makes his ace pitcher Masamiya the shortstop and backup Ishimitsu the ace......?