Eiichiro Kashiwaba stands as a former star player for Meisei High School's baseball team. When Coach Nishio is hospitalized, he specifically requests Eiichiro to serve as interim coach. Eiichiro, however, fails to appear for the role. His younger brother Eijiro instead arrives and takes the coaching position under unclear circumstances, despite having been previously dismissed from the same team. The dynamic between Eiichiro and Eijiro reflects a sibling rivalry fraught with unresolved conflict, mirroring the narrative's central themes of brotherhood. Eiichiro's absence directly catalyzes Eijiro's introduction and subsequent actions as coach.