Called to the classroom late at night, teacher Yumi is suddenly restrained and tormented like prey. Though she resists mentally, her emotions gradually waver—and the entire scene is recorded on video. From that moment on, her days become a cycle of humiliation at the hands of teenage boys, happening during class, on school trips, and even inside her own home. Desperately clinging to her position as a teacher, Yumi struggles to maintain control, yet finds herself unable to stop her own arousal.