The story centers on three characters: Uesugi Kazuya, his older twin brother Tatsuya, and Asakura Minami. Kazuya is the darling of his town, talented, hardworking, and the ace pitcher of his middle‑school baseball team. Tatsuya, a hopeless slacker, has spent his life in the shadow of Kazuya, even though he may be more gifted. Minami, a beautiful childhood friend who feels like a sister from next door, treats both of them as equals. Society largely assumes that Kazuya and Minami will become the perfect couple, a belief even shared by Tatsuya. Yet as time passes, Tatsuya realizes that he is willing to sacrifice anything for his brother, except at the ...