When Yuki Miyata is hopsitalized with an illness, her best friend, Minami Kawashima, offers to take her place as manager of Hodokubo High School's baseball team, despite the fact she hates baseball herself. She buys Management: Tasks, Resposibilities, Practices by Peter Drucker which she later discovers is about business management as opposed to managing a baseball team, but Minami nonetheless becomes intrigued by its contents. Deciding that she first needs to 'define what the team is', she talks with Masayoshi Nakai, who hopes to become the team's CEO someday. Later, Yuki recalls a memory on how moved she was when Minami scored a winning bat during elementary school, which inspired her to join the baseball club. Having determined what the goal of the club is, Minami's decides to move onto the next step: Marketing.

With encouragement from Minami's cheers, the team start making a comeback making the score 4-3 as it comes to the last inning. With Yūnosuke forced to make the definitive bat, he makes the same play that Minami once did when she was younger, the play that inspired Yuki to love baseball, allowing the runners to reach home and clinch the match. As the team celebrate their victory, Minami has a vision of seeing Yuki, remembering all the good times they shared together. With the memories of Yuki in their hearts, the team moves on to the nationals, hoping to play baseball the way the customers want.