Snake and Whip (1986)

Young, ravishingly beautiful girl (Ran Masaki) accepts a lucrative job as a secretary. Pretty soon company boss makes a pass at her in an abrupt manner. When outraged girl slaps him in the face, the man deliberately plans a revenge. Soon the unsuspecting girl falls into a trap and is forced to become his sex-slave! Long accustomed to S&M practices, the boss (we can properly call him “Master” from now on) will stop at nothing to humiliate the poor girl and to make her feel like the common animal.