Takeshi Kuroki, an upperclassman at Meisei High School, scouts Kazuya Uesugi for the baseball team after recognizing his exceptional pitching abilities. He recommends Kazuya as the team's future ace pitcher, subsequently transitioning to third base himself. Alongside his girlfriend Sachiko Nishio—the team manager—Kuroki identifies potential in Kazuya's twin brother Tatsuya Uesugi. Together, they persistently encourage Tatsuya to join the team, believing in his latent athletic talent despite initial reluctance. Kuroki wears glasses and actively participates as a student athlete within the team's dynamics.