A female college student, Shinon, she had a boyfriend who belonged to the same seminar at the University of Science. Kamikawa, the professor in charge of the seminar, was known as an excellent leader at the university because of his dandy atmosphere. The professor, who was aware of Shinon's M-ness, took the opportunity to abduct and tie her up. A young plump body, a rope that bites into abundant big tits ... Professor Sado takes a masochist from his student's boyfriend and awakens him to a masochist. Authentic NTR drama! A new series of Eswan bondage training! !! !!