During my third summer at college, my mother worries that I study too hard and sends me to spend a week at my uncle's country home. My domineering uncle and his seemingly faithful wife Ririko welcome me just as I remember them. A few days later, however, I catch Ririko secretly meeting a man at the entrance and discover her controlling him in an absolute dominant-submissive relationship. Stunned by this completely different side of her, I accept her invitation that night to learn her secret—and she keeps making my whole body cum until I can no longer think straight.