It was because of the rope that I knew the pleasure of sex for the first time.The pain and misery of being tied up gives rise to masochistic libido.An obscene body that becomes sensitive when tied tightly and gets wet when humiliated.Mahiro peeks at her mother and her father-in-law's SM sex.Seeing her mother's ecstatic expression tied up, Mahiro becomes interested in her bondage and masturbates.I was scolded and punished for peeking at her father-in-law while her mother was away.With that as a trigger, her training progresses, and Mahiro falls into a rope slave ●.