Rules of Dating (2005)

An introvert, indifferent woman joins a high school as a student teacher, under supervision of a shameless, nymphomaniac man who is a year younger than her. On a school trip, the supervisor tells the trainee that he wants to have sex with her. The movie deals with the woman willing yet indifferent to indulge in physical relationship with her professional senior. Ethics, morals, feelings, love show up and are turned down.