Sinopsis: Mr. Choi, feeling dissatisfied after his wife expresses displeasure with his poor bedroom skills, decides to hire a 'sex tutor' for private lessons. He succeeds in satisfying his wife with his improved skills, but when his wife discovers his secret lessons, she eventually leaves him. Although Mr. Choi continues to refine his skills, he is left feeling empty and dejected from the sorrow of losing his wife.