During summer break, Miyamae Shiori (Kamiha Taiichika), a teacher at a private school in Tokyo assigned to supervise remedial classes, faced a troubling dilemma. It began suddenly at the end of the first semester—her body had been altered by someone's hand, transformed into an obscenely sensitive state. She found herself in deeply embarrassing situations she could no longer comprehend. This change soon became a threat to her normal life as an educator. As she struggled to confront the physical transformation, she searched for a way to reconcile her duty as a teacher with this new, unfamiliar self.