Touma and Souichirou Tachibana find their Meisei High baseball club suddenly in demand: after the team's showing in the summer tournament, new students line up to join. Among the returning faces is Kenji Nishiki, who walked out in middle school after a dispute with the club's manager, and the stepbrothers' battery now has a deeper roster behind it as Meisei looks toward a second summer. This second season continues directly from the first.