Sara-san came home as a mother-in-law when she was young. However, she was actually a "male mother" with a penis. I found out about it when I happened to witness her father having Sara-san's dick inserted. Since that day, I've been masturbating many times, remembering that reverse anal sex. And three years have passed since my father died, and we, who were gradually shortening the distance in our lives alone, finally crossed the line ...