IENF-095 If I had my sister who was a schoolgirl who sympathized with me who wasn't sick, made me intercrural sex with the promise that "I'm just rubbing" Insert it raw! "Eh !? Is it in?" But I couldn't stop and vaginal

A younger sister who suddenly visited my room. I'll tell you because I don't understand what I'm studying, but I get tired and fall asleep on the way. Lustful for my sleeping sister, I started playing pranks on my sister so that she wouldn't notice, but I was so absorbed in it that I didn't realize that my sister had awakened! My sister who couldn't see it just rubs it, right? And intercrural sex. It must have been that much promise ...?