The fateful semi-finals have finally come. Nagumo has decided to put the team ace Sho (Motoki Nakazawa) on reserve and have Nemuro (Katsumi Hyodo) be the starting pitcher, which is a decision that baffles the team, but they quietly prepare themselves for a battle they can’t lose. However, Yamazumi’s (Haru Kuroki) abdominal pain worsens and is rushed to the hospital.
The match begins against Seiyo High School, led by Gamon (Ken Matsudaira), however their tactics are different than before. The unexpected turn of events cause Etsuzen High School to make a series of mistakes. What will Nagumo do with the panicking team? Will Etsuzen High School be able to advance to the finals!?
Meanwhile, Niwa (Koutarou Koizumi), who seems to have some serious concerns, asks Inuzuka (Fumiyo Kohinata) and others for some advice.