Even though my beautiful but strong-willed sister used to be a delinquent, I (the younger brother) have always been sexually excited by her. She is going to get married soon, but I know that she used to be a delinquent bitch and played perverted games. I'm going to threaten her with this and force myself to do it with her! I've been secretly filming her having sex with other men, and I've been researching how to make my sister feel good and cum, and now it's time to show the results of my research...! I'm going to get my revenge on her for all those years!