GMA-075 Bound and trained wife, repeatedly subjected to sex acts under the guise of training at an old-established hot spring inn. The lewd daughter-in-law, Sae Fujiki, ensnared by her father-in-law's merciless rope bondage.

Following the sudden death of his mother, Sayo took over her husband's family hot spring inn. Her father-in-law, whom she hadn't seen in a while, had become emotionally unstable since his wife's passing. Despite their confusion, they began living together and learning the ropes of the business. One day, while cleaning, Sayo's father-in-law hugged her and said, 'I'm so lonely... Sayo.' She tried to resist, saying, 'Father, please stop,' but she ended up giving in to his intense caresses and ultimately allowed him to penetrate her…