Female teacher ejaculates 20 times in a row, Hizuki Tsuchii IESP-643

The hot and beautiful female teacher, Rui Himezuki. She has a secret: to improve her students' grades, she engages in sexual activity with them. However, her colleagues find out and use this to blackmail her into sexual assault. Later, the principal and homeroom teachers find out, and they end up engaging in group humiliation with the students, culminating in 20 consecutive ejaculations…!