On the third anniversary of my father-in-law's death, my wife and I went back to the countryside where my mother-in-law lives during the Obon holidays. My mother-in-law, Natsuko, is always kind, and her voluptuous breasts are always exposed, so I couldn't stop my heart from pounding every time we went back home. I tried to relieve my sexual desire, but my wife didn't pay me any attention, and the day of the memorial service arrived in a state of frustration. I drank as much as she offered me, and fell asleep with my sexual desire at its maximum. Then, when I woke up, I mistook Natsuko, who was standing in front of me, for my wife and attacked her...