Suk Moo is a very picky and sensitive man. He used to play music in college but gave up on it. He has a nagging feeling that he hasn't chosen the right path in life. On the other hand, Hwi Roo is relaxed and positive. When she has a hard time finding a job, she earns money by running a guest house on the second floor of her home and working as a fitness instructor. She doesn’t care about petty things. One day, Suk Moo and Hwi Roo meet when they get into an argument over a piece of cake. Yoo Young is a strong, independent woman, but sometimes she seems fragile. Jang Hyun is a bad boy who is popular with women. He doesn’t seem like the type to get married, but he did marry Yoo Young. Is marriage really the perfect form of love? This romantic comedy shows how men and women think differently about love, marriage and family.