Seishu wins their first game of the autumn prefectural tournament. On a day without practice, Aoba and Ko each decide to clean their bedrooms, which neither does regularly. As thanks for saving her, Akane makes Aoba a frilly cushion, telling Ko that she always wanted a cute little sister like Aoba. While delivering it, Akane learns that Aoba had an older sister, Wakaba, who died. When Akaishi helps his father deliver liquor to the Takigawa soba shop, he again is shocked by Akane's appearance, after which Akane learns from Senda of her resemblance to Wakaba. After practicing in the Tsukishima batting cages, Azuma eats a meal cooked by Aoba at the Clover Cafe despite Ko's warnings. The next day Azuma has acute appendicitis and misses Seishu's next game. While watching it, Akane learns that Aoba cannot play in tournament games such as this one, and begins watching Aoba in the stands. The game is a pitchers' duel that Seishu ultimately loses 1 to 0.
秋季大会が始まり、初戦を難なく通過する星秀学園。暴漢から助けてもらったお礼をしようと、あかねは青葉にプレゼントを用意する。青葉のような妹が欲しかったと呟くあかねを複雑な心境で見つめる光。そしてあかねと光は、プレゼントを渡そうと自宅に青葉を訪ねる。そこであかねは、亡くなった若葉のことを知り…。
추계대회가 시작되고, 첫 시합을 무난하게 통과한 세이슈 학원 그리고 봄의 코시엔을 목표로 기합을 넣는 코우와 아카이시. 한편, 아오바에게 도움을 받는 아카네는 답례를 하기 위해 선물을 준비한다. 선물을 주기 위해 찾아간 아오바의 집에서 죽은 와카바에 대한 사실을 알게 되는데...
