Always alone at school, a shy and quiet beautiful girl named Kokoro who loves books and always stays in the library. One day, after being aroused by her homeroom teacher's lecherous gaze and perverted fantasies, she was attacked by him when they were alone in the library. She put up a little resistance but ended up being raped. Unable to forget the pleasure of that moment, she summoned her teacher and kissed him eagerly. Since then, the days of vulgar sex between the middle-aged teacher and the timid female student began.
