The bond between three kids; the talented Kazuya, his lazy do-nothing brother Tatsuya and their childhood friend, the adoring Minami. Baseball, brotherhood, love, and high school challenges and strengthens their connection to one another.

The story initially focuses on the love triangle between the twin brothers Tatsuya and Kazuya Uesugi and their love interest Minami Asakura. Kazuya has always aimed at perfection, working hard to get the best grades and to compete at several sports. Tatsuya has raw talent at sports and could easily outperform his brother, but he has always felt content to let his brother get the spotlight. But as the boys enter high school, Tatsuya is increasingly tempted to step out of his brother's shadow. When Kazuya is killed in an accident, Tatsuya finds himself having to replace him at the sports' field and in his relationship with Minami.