The Madonna-like existence of a female teacher, Sakurai Ayu, at the school. One day, a transfer student arrived in her class. He was actually her long-lost brother. The brother, following the bullies' orders, secretly filmed Ayu masturbating and even raped her. Using these recordings, they blackmailed the students into forcing Ayu to perform lewd acts. It was all a trap set by a fellow teacher. Rape, incest, 20 consecutive internal ejaculations!
