The Woman with Red Hair (1979)

At his working place, Kozo and his colleague gangrape the boss' teenage daughter. Then, on the highway, he picks up a red-haired woman walking on the road back to his home. She ends up staying the night. Later, the woman reveals that she has left her husband and son, but refuses to divulge her name. On the other hand, the boss' daughter informs Kozo's colleague that she is pregnant. They decide to elope but, before that, he demands Kozo to let him have sex with the red-haired woman...