IENFA-4003 - Woke up to find a large-breasted older sister in a very exposed state inside the futon! She clung to me intimately with her nipples due to loneliness, and my erect penis hit her vagina, causing mutual arousal and leading to raw insertion! Insertion! Asami Sena

I used to sleep with my step-sister when we were children, but my grown-up step-sister got up to go to the toilet at night and, seemingly sleepwalking, came into my futon! She teased me while I panicked, saying 'We used to do this often, didn't we?' Her breasts were completely visible without a bra, and the directly conveyed sensation was too much to bear! My step-sister also seemed to be getting excited…!?