Newly enrolled in the baseball team as a transfer student, Yamaguchi Tsutomu is assigned to the "D" team by the coach due to his weight and slow running ability. In contrast to the "A" team, where outstanding players dominate, the "D" team comprises of misfit players who do not anticipate any game time. Nevertheless, Yamaguchi remains resolute in his ambition of being a professional second baseman and refuses to lose hope.