Sawamura finally gets his moment on the Koshien mound, and the show knows exactly what that means to him. Seido walks into a stadium full of ghosts and champions, into a pitcher they have to break. Every inning matters because this is the tournament that decides everything, and there's no second chances at that level.

Diamond no Ace act II: Second Season Part 2 is a 2026 Sports TV anime that serves as the second cour of act II's second season. The act II story began the year after the fall tournament, as the Seidou High School baseball team, with a mix of returning and newer players, set out on its tournament run toward Koshien. This part carries that second season forward.