My parents left for a long business trip, so instead of leaving me on my own, they sent me to my cousins' house. My sweet cousin Sakura is like a sister to me. In the years since I last saw her, she grew huge breasts and became an adult woman. "Take care of me, Kazu-kun. I will do anything I can for you." With that began my life at my cousins' house. Sex all day and night!