Shido tells Daimon that the portable team has been playing practice games without permission, losing all five times. After a sixth loss, Azuma learns from Tubby who the opponents were. Shido orders the portable team be disbanded. However, Maeno proposes to instead hold a rematch scrimmage with the losing team's coach losing his job, and Daimon agrees in order to settle things once and for all. When Momiji's mysterious old man visits a portable team practice, Tubby introduces him as her grandfather. Yuhei Azuma tells his older brother he will get to Koshien for certain, to which Junpei says to have fun with baseball. Because of his differences with Daimon, Miki transfers to another school. The portable team recruits Aoba for the scrimmage to replace a retired third-year player, and to convince her to play center field instead of pitcher, Akaishi has her bat against Ko. After watching the portable team practice, Azuma deliberately injures himself to avoid playing in the scrimmage and tells Daimon to prove that he has enough other good players to take him to Koshien.
夏の大会が終わり、他校と練習試合を盛んに行う光たちプレハブ組。今がプレハブ組を追い出すチャンスと校長代理は前野監督にクビを宣告するが、逆に前野監督は１軍の大門監督と互いのクビをかけた試合を提案する。普段は穏やかだが、一転して厳しい練習を課す前野監督。一方、1軍の東は大門監督にあることを告げる…。
여름 대회가 끝나 평소같이 연습하는 세이슈 학원 1군. 한편, 코우와 가건물 팀은 타학교와 연습 시합을 계속 하지만 전적은 5전 5패. 그 사실을 알게된 교장 대리는 지금이 가건물 팀을 쫓아낼 기회라며, 마에노 감독을 자르겠다고 선고한다. 하지만 마에노 감독은 역으로 다이몬 감독에게 자리를 건 시합을 제안한다. 마에노 감독의 도전을 쿨하게 받아들이는 다이몬 감독. 한편 이전부터 다이몬 감독과 사이가 좋지 않던 미키가 다른 학교로 전학을 가게 되는데...
