Rin was addicted to having a physical relationship with her student, an act that is inappropriate for a teacher. Touching the sexual desire of a young man was stimulating, and their secret rendezvous was immoral. However, the situation changed completely when the student asked for a relationship even on school grounds. Rin desperately tried to calm him down, but the student, who had been trained by Rin and turned into a sex monster, would not stop. Rin could only desperately hold back her voice as the student penetrated her in a corner of the school.