We didn't know. The girl's true nature, hidden behind her smile, was beyond our imagination... Onosaki High School's baseball club was a home to just 9 members. But they weren't discouraged by its small size, and led by their captain Kenji, they practiced hard hoping to win their first regular game. One day, the baseball club got its first manager: Koishikawa Hana, a first year with an earnest bob cut. Supported by Hana's cheers, the Onosaki Nine became even more fired up. With no idea of the fate in store for them... "Kusu... Where are you all looking?" Their daily scenery gradually melts. The youthful days of these teen baseball players who single-mindedly pursue the sport is dyed in depravity by a single girl...