잘 생기고 성욕 왕성한 정수는 여성들의 개인 PT를 하고 있다. 여성 고객과 정사를 벌이다 남편에게 발각되어 쫓겨난 정수. 엄마친구 수영은 정수에게 개인 PT를 부탁한다. 정수는 개인 PT를 하며 엄마친구 수영을 여자로서 좋아하게 되고 수영과의 섹스 생각만 떠오르게 되는데....Dong-jun, who lives with his mother Si-yeon. His mother's friend, Yu-min, who visited often when he was young, comes to the house. After her divorce, she lives with her, who has nowhere to go. Dong-jun, who feels the young Yoo-min he saw as a child, as a woman, and Yoo-min, who doesn't think of his nephew, Dong-jun, as a man. Yu-min shows off her underwear without hesitation, and Dong-joon, who was hurt by such a figure, finally confesses to Yu-min seriously... Yu-min just laughs at how cute he is.Si-yeon brings her lover into her house to remarry. Yu-min, who is heated by the love between the two, remembers Dong-joon, who had no idea what to do with his lewd appearance, and seduces him…