After finding out about my mother's sexual fetish and realizing I have the same masochistic tendencies… I accidentally see my mother and stepfather having SM sex. Seeing my mother's blissful expression while being bound, Mai, who became interested in bondage, masturbates. While my mother is away, I get scolded by my stepfather for peeking and end up getting punished. This becomes the trigger for training, and Mai falls into becoming a rope slave●…
