Chinatsu is stunned when her father-in-law suddenly enters the bathroom, announcing that he is coming in. The usually kind and understanding man quickly corners the confused woman beside the tub. Claiming he has always dreamed of washing each other's backs as a family, he reaches out with his rough fingers and touches her full breasts. In that instant, Chinatsu realizes her happy marriage may be over as their two-generation household descends into a forbidden relationship that destroys the boundaries of family.