Koharu is a promising adult track athlete receiving one-on-one coaching during an intensive camp, unaware that her corrupt coach sees her only as a sexual target. He doses her with aphrodisiacs, heightens her sensitivity with obscene massage and toys, then drives his cock into her oil-slick ass-up body. Training gives way to relentless conditioning, a three-way pursuit pounding, blank-faced orgasms, erect nipples, and repeated sweaty squirting.