Mito Kana is a righteous and devoted wife married to Shingo, a high school teacher. Their peaceful life takes a dark turn when Kimura, a delinquent student with powerful political connections, begins bullying classmates. While Shingo chooses to stay silent, Kana intervenes with disciplinary action that borders on physical punishment. Harboring deep resentment, Kimura conspires with other students to humiliate Kana, orchestrating secret acts of infidelity and capturing compromising photos. From that moment on, Kana is forced to obey Kimura's every command, plunging her life into a nightmare of submission and betrayal.