Recently transferred teacher Tsukasumi has been diligent and passionate about her work, but she's also involved in an affair with a married colleague. One day, their illicit activities are caught on camera by students within school grounds. From then on, they're blackmailed with threats of exposure unless they comply. As the situation escalates, the students take turns violating her body at their leisure... Her resistance weakens as she becomes increasingly overwhelmed by their lustful desires.