"Miss Chinatsu, I must disturb you." Chinatsu's stepfather suddenly entered the bathroom, leaving her unable to hide her surprise. The usually gentle and understanding stepfather's atrocity. Confused, Chinatsu was easily cornered in the bathroom. "Washing each other's backs with my son is my dream," he said, but the moment his rough fingers touched her full breasts, Chinatsu realized her happy marriage was over. The forbidden relationship formed by two generations living together drove their parent-child bond to madness.