Minami steps onto her high‑school baseball squad as the new manager after learning that her best friend Yuuki has been hospitalized and can no longer serve in that role. Determined to step into Yuuki"s shoes and support the team as best she can, she sets out to locate a guide on baseball team management.
She mistakenly purchases Peter Drucker"s volume, "Management: Tasks, Responsibilities, Practices," which actually focuses on corporate leadership. Unable to return it, she resolves to read the book and adapt its business‑management principles for her squad so they can continue competing and ultimately secure a spot in the Nationals. She plans to apply concepts like goal setting, resource allocation, and performance evaluation to improve the team's cohesion and confidence together.