My little sister suddenly came to visit my room. She says she doesn't understand her studies, so she teaches, but she gets tired on the way and falls asleep. I got lustful at my sleeping sister and started playing pranks on her sister so that she wouldn't notice, but I was so absorbed in her that I didn't even notice what had happened to her sister! My sister who couldn't see it just rubbed it? and intercrural sex. That should have been the promise...?
