SSNI-819 Bondage NTR - A busty college student Yumi Shion trained by a respected elderly university professor

Shion is a female college student, and her girlfriend has a boyfriend who belongs to the same seminar at the university of science. And the seminar teacher, Uekawa, had a dandy atmosphere and was known as an excellent coach at university. The professor, who senses Shion's masochistic nature, looks for the opportunity and kidnaps her and ties her up. A young, plump body, a rope that nips into her plump big breasts... Professor Sado cuckolds Shion from her student's boyfriend