A woman with a pure and beautiful back view like an angel. She stands in the position of a private tutor, but her presence stirs her student's heart, transforming her into a lewd masturbation puppet within his fantasies. Drawn to her, the student gradually blurs the line between reality and fantasy as his uncontrollable desires spiral out of control, eventually escalating into a lesbian relationship. As a result, they plunge headlong into the most terrifying situation...