Houkago no Manager Hakudaku Rinkan no Ground ni Chitta Shojo Ikenie Saotome Chizuru

Chizuru Saotome, the baseball club manager at Takanomori, a school famous for its school baseball team, is sexually ab*sed on the baseball field at night by someone. A number of days after that a man interesteed in joining the baseball club appears. That man turns out to be Yoji Hiura, the man who ab*sed Chizuru. Hiura got Goki Ohjima wrapped around his little finger by showing off his pitching and made sure Chizuru's body was the condition for him entering the baseball club. That was the beginning of hellish days of violation for Chizuru.

[From DLsite English]