Their neighbor Minami and Tatsuya, and twins Kazuya have played together since they were children and built an unbreakable bond. However, with childbirth, the twins accomplished something: three is a crowd, and Minami can be actually a girl. Because the trio tries to conserve their relationship, Kazuya's pledge to make Minami's fantasy be realized by taking her with his baseball pitching skills to Koshien creates the Tatsuya wonder himself, and their or her own goals. But Minami has yet another fantasy she wants fulfilled, so that as the twins continue to push ourselves, with Minami at the middle, a life-changing tragedy leads you twin down a path he never would've considered...