Kokoro is a beautiful girl from a single-parent family. One day, her mother Mary, who works at a bar, brings her stepfather Kita over. Kita shows Kokoro sex with Mary, and when he gets her aroused, he takes her for a ride. He caresses her thoroughly, as if to instill pleasure in her, and penetrates her hymen... But that's not all, Kita makes Kokoro get raped by debt collectors to pay off his debts. After being raped by these vile men, Kokoro eventually awakens to her masochistic tendencies...