Narusawa has his eye on Nagisa, a new teacher, and frames her for losing a test paper. With Nagisa's weakness exposed, she is forced to give a "naked lesson" as an experiential human model in a physical education class, where she can see and touch a woman's body directly... Nagisa has a strong sense of responsibility, and Narusawa takes advantage of her. In this abnormal situation, the earnest new teacher is forced to experience a naked, shameful orgasm and has cocks thrust into her one after another, awakening her as a lustful, crazy teacher...