The main character, Touya, is a substitute on the baseball team, but he is hardworking and practices harder than anyone else. He is mocked by the regular members every day, but Ten, the female manager who watches over him from behind the scenes, is attracted to the hardworking Touya and confesses her feelings to him, and the two start dating. Touya is determined to make the team this time, but he is not selected by the regulars. On top of that, they are told that they cannot bring substitutes to the training camp due to the number of rooms. Ten says, "I'll let you know on LINE during the training camp," and Touya responds, "I'll work hard on my own practice too!" They encourage each other. At the training camp without Touya, the team members surround Ten in a group, saying things like, "I've had my eye on Michihisa for a while, haven't I?"...