NACT-129 — A Voyeuristic Masochistic Tutor Witnesses Her Student's Father's Hardcore S&M Mating And Becomes Aroused. With Her Secret Exposed, The College Student's True Nature Is Revealed Through Cotton Rope And A Collar In This Complete Record Of Her Training. (Rin Ouka)

A female college student working as a tutor secretly watches her student's father having passionate sex and indulges in self-gratification, thinking, "The father was so handsome." However, the next day, her weakness is exposed when her father says, "You were watching with such rapture," and she is forcibly "developed" into a masochistic slave! This is a record of her training as she is fitted with a dog collar and leash and f** to crawl on all fours, begging for semen, becoming a completely submissive masochistic slave!