Living in Tokyo away from my hometown, I used my vacation to return to my parents' house for the first time in a while. My parents and grandfather live there together. Since my grandmother passed away, my mother has been nursing my depressed, half-bedridden grandfather, while my father has no interest in the family and is always out. One day, I heard a strange voice leaking from my grandfather's room—the unmistakable sound of a female in heat. Curious, I quietly opened the sliding door. Inside, I saw my mother in a vulgar state, having her breasts devoured by my grandfather while she lovingly fondled his cock...