Arc 7Seido’s Koshien Run
Kōshū helped Seido defeat Inajitsu and became a crucial part of the team’s relay pitching plan as Seido advanced through Koshien. The story left Seido preparing to face Great Troll Wisteria in the final while confronting concerns about its batting lineup before the matchup with Kyoma University.
- Kōshū entered against Inajitsu with the bases loaded, escaped the inning, and struck out Ban to preserve Seido’s lead.
- Kōshū reached base and stole second against Narumiya Mei, then pitched Seido through the final innings as Narumiya and Harada’s team fell to Seido, which secured its trip to Koshien.
- Kataoka named Seido’s Koshien roster and established a relay pitching plan, and Seido won its opening games against Ichizen and Yozei.
- Against Seihō, Seido rallied from Tanba’s early two-run deficit, and Kōshū entered in the seventh to retire batters including Sano Shuzo as Seido advanced.
- Seido defeated West Tokyo and reached the quarterfinals, then Lang Zhi told Miyuki about Kōshū’s perfectionism and how he had changed around strangers.
- Seido beat Ikuei 11–4 and Takeyama 9–2, while Great Troll Wisteria used repeated pitching changes to win its semifinal and earn a place in the final against Seido.
- As Seido prepared to face Kyoma University, Chris warned that Seido’s offense relied heavily on its third through sixth hitters, while Kōshū acknowledged Kyoma’s pitchers had more experience.