Two best friends. And their lust for each one's opponent mothers. Junhyeong and Daejin are best friends. One day Daejin’s mom visits Junhyeong who is heartbroken when he was disappointed in love. She suggests that she will teach him sex and make him a real man. Unlike Junhyeong, Daejin is popular guy to women. But he long since has fallen in love with Junhyeong’s mom. When Daejin hears Junhyeong’s parents seems to divorce, he decides to start expressing his affection to her.