Popular and beautiful teacher Yuzuka receives a bullying consultation from a student one day. Though she soon realizes the consultation was based on a misunderstanding, there's no turning back. She ends up becoming involved with the student, yet fails to grasp the true meaning behind it. Upholding her sense of duty and justice as a teacher, Yuzuka gradually finds herself cornered by students and threatened by fellow staff members, forced into humiliating sexual situations. Daily torment and abuse carve deep wounds into her psyche, while somewhere within her, masochistic desires begin to awaken. Even when students beg her to return to her former self, their voices no longer reach her ears. Having lost her ideals as an educator, Yuzuka's life takes a new, darker path.