Minami Kawashima becomes the new manager of Tokyo's Hodokubo High School baseball team to help her best friend, Yūki Miyata. Yūki is the current manager, but due to her weak health she ends up in a hospital and might undergo a surgery. While searching for a book to assist her, Kawashima accidentally buys "Management: Tasks, Responsibilities, Practices". Written by Peter Drucker, one of the most important authors on the subject of business management, the book unorthodoxly guides Minami on how to administer the team.