Although they are his friends older sisters, theyre just too attractive — he cant help but fantasize about having hot sex with them! Nam-cheol and Gi-soo are close friends who attend a provincial university. Since Nam-cheol doesnot have an older sister, he has always envied Gi-soo for having them. During vacation, Nam-cheol decides to stay at Gi-soos home in Seoul. When he arrives, he is warmly welcomed by Gi-soos sisters, Hyeon-ji and Soo-jin. Seeing how much prettier and younger they look than he expected, Nam-cheol begins fantasizing about having sex with them. Meanwhile, both sisters, noticing how different and manly Nam-cheol seems compared to their brother, also start imagining a passionate night with him. Will Nam-cheol really end up in bed with both of his friends sisters during the vacation?