Kirra is about to fail her college Phys. Ed. class. So her coach decides to give her a chance to get extra credit. But here is the hard truth: Kirra hates exercise. And when she gives up, and is about to fail, she decides that it's time to show the coach how she likes to work up a sweat. She pulls her pants down over her ripe, white ass and she goes down on his cock like she is trying to milk an A+ out of his nuts. She gets a good poolside pumping and the coach realizes that although she will never graduate at the head of her class, little Kirra can milk the head of his cock like a true athlete. And although he doesn't give her an "A", he does give her a "C", for cum.