I was a student preparing for exams, living each day with the sensitive body and mind of adolescence. During the summer break, my parents went on a trip and I was sent to stay at a relative's house. Momo nee-san, whom I hadn't seen in a long time, had matured dramatically—she was now incredibly sexy and radiated a stunning beauty. When she suddenly hugged me, I couldn't breathe, my body trembling. "Have you been studying this whole time?" she asked, clearly surprised by how much I'd grown. Then she said, "My, my, your little thing is already a full-grown man's," and touched my body. Her warmth threw me into further confusion, shaking my rationality. Ever since arriving at this house, I couldn't concentrate on studying—I blamed it all on Momo nee-san. The next morning, on my way to the living room, I found lingerie lying on the sofa. Was this a trap? My rational mind shut down. The scent of Momo nee-san's panties was like the perfect woman's fragrance, and I couldn't stop jerking off. I ended up confessing honestly. In response, Momo nee-san said, "Not taking breaks is bad for your health," and right then and there, my very first morning creampie sex began. Momo nee-san sucked my cock, made me cum freely as she pleased, and I experienced the thrilling excitement of puberty like never before. That day, I felt pleasures I could never get at school or cram class, and my heart was deeply shaken.