I had a "just rub against each other" agreement with the sympathetic younger sister of a pitiful me, and while we were doing sumata, it felt so good that our pussies got all wet and slippery! Before we knew it, I smoothly slipped inside her raw! "Huh!? Are you inside?" But I couldn't help it and ended up cumming inside her! Starring Mari Kagami, with panties and a cheki included.