Despite the close friendship and business partnership between their families, Kou Kitamura and Aoba Tsukishima are frequently at odds. While Kou is the only child of the owner of a sports shop and has impressive batting skills from regular visits to Aoba's family-run batting center, he has never shown any interest in baseball. On the other hand, Aoba is a committed baseball enthusiast and a star pitcher with exceptional skills. Despite their differences, Kou and Aoba share a common admiration for Wakaba Tsukishima, Aoba's elder sister, and Kou's destined partner. However, their rivalry often puts Wakaba in the middle. Unaware of the similarities between them, playing baseball together could be the key to overcoming their personal struggles and discovering their bond.