One day, a beautiful, seductive older sister moved into the apartment next door. That night, as I lay in bed, I heard suspicious sounds coming from the neighboring room. Listening closely, I realized it was a man's moaning. It was the older sister having sex and making him moan with pleasure. The next day, I heard another man moaning... My lewd fantasies continued to grow in my M-type mind. One day, I accidentally ran into the older sister in the hallway and she invited me...