Perhaps because her husband is often away, the relationship between Misato and her stepson Eiji grows deeper with each passing day. "It wasn't supposed to be like this..." Misato sighed to herself, but Eiji could not forget the day that caused a rift between them. A few months ago, when Eiji's older brother Toru was still living in the house... Toru, who was about to study abroad, forcibly took Misato's anal virginity, unaware that Eiji was watching him. Eiji could not get the image of his mother's anal hole with his brother's dick in it out of his head...