Before the prefectural summer tournament begins, Aoba teaches Ko how to throw a slider. Midori asks Aoba to pitch for her high school team in a practice game against Oka University, the current national champions in women's baseball. Aoba refuses, claiming Seishu as a prior commitment. At practice, Aoba overhears some younger Seishu players say her pitches are hard to bat because they want to avoid hitting a girl with the ball. That night, she remembers Wakaba telling her she will pitch at Koshien. After Meano turns down an invitation to play Oka, Aoba watches Oka defeat another high school boys team and agrees to play for Midori's team, Satomi Girl's School. However, the Satomi catcher and team captain, Matsuyama, does not allow Aoba to start as pitcher. In the first inning, the Satomi center fielder is injured and Aoba substitutes for her. When Aoba makes a play for the final out of the inning, she is welcomed by the other team members. At the end of the first, Oka leads 3 to 0.
青葉にチームに加わって欲しいとお願いでするために小金沢みどりがやってきた。みどりの所属する里美女子高校が女子野球の強豪、桜花女子大学と練習試合をするという。強豪相手に良い試合をしたいということで、青葉に助っ人をお願いしにきたとのこと。だが、青葉は星秀学園の部員であるという負い目から断ってしまい…。
코가네자와 미도리는 아오바를 찾아와 팀에 합류해 달라고 부탁한다. 이번에 시합을 하게 된 강호 오우카 여대 야구부와 좋은 시합을 하고 싶으니, 아오바가 와서 도와달라는 것이었다. 하지만 아오바는 세이슈 야구부의 부원이라는 이유로 거절을 하고 마는데...
