30 years ago, Meisei High School’s baseball team won the much sought after Koshien Tournament, but haven’t come close since. As the new school year at Meisei Junior High School begins, brothers Touma and Souichirou Tachibana start practicing in secret.

Otomi adopts a dog and names him Punch, as the Meisei baseball team debates who should be the club's ace pitcher.

The Meisei Junior High team progresses through the prelims of the national juniors by the skin of their teeth. Souichirou’s battery relationship with his brother also begins to be explored.

To everyone’s surprise, Daisuke pitches a whole winning game despite only having practiced with the team for an hour. The Meisei team goes to the Tokyo Tournament, but Daisuke doesn’t show up until the game is well under way.

Meisei loses their match to Seinan after Nikaidou has a bad inning. Nishimura, Seinan’s pitcher, tries to convince the Tachibana brothers to transfer to his team.

The mystery of Daisuke's odd practice attendance pattern is revealed. The new season brings changes to the Meisei baseball team, including a new Manager!