Sex for good grades

As any other good student Polly Yangs wants to get good grades for her efforts. She comes to one of her teachers hoping to improve her grades. He checks her knowledge and even gives her a test to make sure she learned everything he told her. Unfortunately he finds her efforts not sufficient to get her the grades she wants. Polly Yangs feels sad but the teacher tells her there is another option for achieving her goal. Polly Yangs feels surprised but then surrenders to the dude and his hard dick.