Mizuki Ashiya is a star of track and field at her high school, but when she falls for a fellow athlete who attends an all-male high school, she figures out an ingenious plan to get close to him. She disguises herself as a boy, transfers to his school, and becomes his roommate. In this volume Mizuki's friend Nakao convinces Mizuki to tell Sano that she loves him. But as roommates and friends, a rejection could make Mizuki's situation unbearable....