The interest in the masochist's propensity to be tied up by drowning in pleasure turns into desire! "One Day, I Witnessed My Mother And Father-In-Law's SM Sex, And I Didn't Want To Peek In. When I See My Mother's Tied Up Ecstatic Expression, I Feel A Strange Excitement And Masturbate. From My Father-In-Law While My Mother Was Away. She gets scolded and punished for peeping in. That triggers the training, and Mai falls into a rope slave..."
