Image of a Bound Girl 1980 on netflix

A professor of erotic art sees his chance to practice what he teaches when by happenstance he meets a suicidal high school girl. Unsure at first how to bind and discipline his captive he is assisted by a bartender who shows him the finer details of bondage on his own slave. As he continues to subject his captive to more intense S&M training he risks both his academic position and his marriage.