ROE-431 When I returned home, I found out that my grandfather and mother were having an affair. What I saw that day turned me into a lifelong "MILF lover." Sae Tsubaki

I had been living alone in a dormitory near my school, but I recently returned to my parents' house. My parents and grandfather live there. My grandfather had been bedridden since my grandmother passed away, and my mother was caring for him. My grandfather would occasionally summon my mother in an inaudible voice to help take care of her. One night, I heard a strange voice coming from my grandfather's room. It sounded like a sweet woman's voice, interspersed with a growling voice...