Chihiro, unable to express her feelings for her first crush, is a shy girl in love. It was her homeroom teacher, Mizuki Yayoi, who changed her. Overwhelmed by the teacher's passionate description of sex, she realizes, "Sex is something pleasurable and joyful." And she thinks to herself, "I also want to make you feel good." Witness Chihiro Miyazaki's first nymphomaniac sex, where she looks, touches, and expresses her feelings for the first time. Watch as the quiet girl transforms before your eyes.