One day, Nao, a teacher at a part-time school, discovers a video of a student in her class being bullied by other students in the same class. The content of the video escalates day by day, and eventually the bullies turn their fangs on Nao, who is trying to protect the bullies. Nao falls into a trap and is blackmailed with the video of her being raped, and is humiliated by 20 consecutive creampies...