In the bottom of the 12th with Seishu leading 2 to 1, because Ko is tiring, Akaishi tells him to pitch all out to decide the game now. With two outs and a runner on first, Mishima comes to bat. Still pitching in the high 150s km/h, after reaching a full count, Ko walks Mishima with what Junpei calls the fastest pitch of the day. As Aoba watches Ko strike out the last batter, she remembers what he said before the game: that Seishu would go to Koshien, he would pitch 160 km/h, and he loves her more than anyone. After the game Ko hugs Aoba, who slaps him, saying she hates him more than anyone, then cries into his chest.
The morning before traveling to Koshien, Akaishi visits Akane in the hospital, Nakanishi consoles Azuma for losing Aoba, and Aoba and Ko meet at a cafe near the train station, where they talk about Wakaba and Akane's influence, and then leave holding hands. During the closing credits, a newspaper headline says that Ko's final pitches reached 160 km/h.
延長12回表。光の活躍で、星秀学園が1点を勝ち越す。しかし、光には疲れが見え始めていた。ツーアウトをとるものの、同点のランナーを1塁に置いて、打席に迎えるのは三島。最後の力を振り絞り、158キロの速球を連発する光。三島も負けじとホームランと紙一重の打球を打ち返す。光は渾身の1球で勝負に出るが…。
세이슈학원과 류오학원은 연장 12회 말을 맞이하고, 코우의 활약으로 세이슈학원이 1점 역전한다. 드디어 코시엔을 의식하기 시작한 세이슈학원 선수들. 하지만 지금까지 계속 던져온 코우에게 지친 기색이 드러난다. 어떻게 투아웃까지는 잡았지만 동점 주자를 1루에 내보내고, 타석에는 4번 타자 미시마. 코우는 미시마와 대결하기로 결심하며, 남은 힘을 다해 158킬로짜리 공을 연이어 던지기 시작하는데...
