I want your cum and I want it quick! Follow my instructions and jerk off how I tell you to! You must tribute my perfect butt with your cum. I will show you how I want you to jerk off, then, I'm gonna turn around and shove my big ass in your face while gesturing the speed at which you should move your hand. In the end I will give you a cum countdown, and you must cum exactly at the end of it! If you fail, you must watch the video again and retry!  TL:DR - Ass fetish JOI with cum countdown