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In the summer of my third year of college, my mother told me to take a vacation because I was soaked in studying, so I decided to stay at my uncle's house in the country for a week. In the countryside, my uncle, who is the owner of the house, and Rinko, who is chaste, welcomed me, and I felt nostalgic for the two of them. A few days later, Rinko, who should be chaste, had a secret meeting with a man at the front door. There was Rinko who manages a man with an overwhelming master-slave relationship. When I was stunned by the appearance that was 180 degrees different from usual, I was invited to teach a secret that night.