While his wife was traveling alone, he had a forbidden secret meeting with his sister-in-law Riho. As the couple's relationship cools down, she can no longer stand her temptation. "Anyway, my sister is having an affair while traveling..." Still, her reasoning is blown away to the extent that she thinks it's no good... During the day, evening, night, and the next morning, Riho, who is much more erotic than her wife, and dense SEX are repeated over and over again. The best time to keep seeking each other. I want to stay connected. It was too pleasant that my head melted with a sense of immorality and euphoria.