The father-in-law couldn't stop playing around with women and started living alone. His son's wife, Karen, tries to persuade him to come back, but he even asks Karen for a relationship! The father-in-law's persistent sexual techniques gradually make Karen open her Kokoro and legs... Skin touching. Bodily fluids interchanging. Genitals intertwining. Close contact in missionary position! Close contact in doggy style! Close contact in cowgirl position! Father-in-law and daughter-in-law, intimate and unfaithful mating!