Shyly ask him to stop

At first you think it might be a coincidence, but then you feel the big hand actively kneading your asscheek. You turn your face to the tall man molesting you and a few weak words leave your mouth <<uhm... c-could you please stop?>>.

The hand leaves you ass for a moment but then a firm pull up on your shorts makes your them shrink between your buttcheeks, leaving your buttocks fully exposed. As you instinctively bring your hands to your crotch, because of the violent pull, your bare ass get slapped and another hand grabs your other asscheek...