Han Ji-eun, an aspiring script writer, lives in a house called "Full House" built by her late father. One day, her two best friends trick her into believing she has won a free vacation. While she is gone, they sell her house. On the plane, she meets a famous actor named Lee Young-jae. Through comedic events, they get acquainted during her vacation and when she returns, she discovers her house has been sold to him.
Though they don't get along with each other as she is messy and he has a bad temper and likes cleanliness, they agreed to live with each other. At first, Ji-eun works as his maid in order to buy her house back, but because of Young-jae's wish to make the love of his life and Kang Hye-won jealous, they get married. They set up a contract for the marriage to last six months. During that time, complications arise and Ji-Eun and Young-Jae become attracted to each other.
Song Hye-gyo as Han Jee-eun
Jee-eun is a cheerful, spirited and lively realist, who under no circumstances seems to be upset, but who is also very stubborn. She looks very sprightly on the surface, but deep inside she is easily hurt and introverted. She pretends to be smart and upbeat but in reality she is dull-witted and naïve. She becomes easily attached to things and people she likes, and at the most decisive moments she tends to become soft-hearted. While naïve and unsophisticated, she always speaks out when she considers something to be wrong, because she thinks that hiding things in your heart is foolish. Jee-eun is an Internet love story writer, whose nickname is “money-maker.” She also has a part-time job as she needs more money to maintain the Full House. She is a cute personage who firmly believes that money is the only thing lonely people, like she, can trust.
Jung Ji-hoon(Rain) as Lee Young-jae
Young-jae is one of the best Asian stars. He does his utmost not to hurt other people and not to be hurt himself. Every movie he starred in became a blockbuster. He is stubborn when it comes to selecting which movies to star in, but he has received much acclaim for his talent. Although Young-jae always behaves and speaks as he wants, he does that only to protect himself from being hurt and to be careful not to hurt others. People think of him as a very candid person, but that is also Young-jae’s strategy to hide himself – or rather his failure to express himself to the fullest. As the one who is unaccustomed to being frank and open, Young-jae is bad at making friends and very proud of his ideals and principles.
Han Eun-jeong as Kang Hye-won
Hye-won is the daughter of Doctor Lee's friend. She is a fashion designer, who designs Young-jae’s clothes. She has known Young-jae’s family since her childhood. Her entire life Hye-won has lived in abundance and had many choices. She looks like a fairy-tale princess: long, straight hair, mysterious smile, slim body plus good manners and a charming personality. She comes from a rich family, and is accustomed to being loved. She has never been rejected by anybody, and only feels content when everybody around her loves her. This self-respectful girl is also smart and realistic. She knows the harsh reality of life and is very prudent. She believes that happiness is an objective thing that can be achieved through negotiating.
Kim Seong-soo as Yoo Min-hyuk
Min-hyuk is a director of a large media company. He dreams of establishing Asia’s Walt Disney or Fox. This tenacious and smart guy is also respected and recognized for his skills. He is confident in earning trust from people. He has always been a winner, and is determined to remain one for the rest of his life. This good-looking guy possesses sophisticated manners and is very eloquent – a prince charming that any girl could ever dream of. Min-hyuk believes that life is too short to live it without fun. Although he looks to be light-minded, he is very affectionate inside. Unlike his seemingly unrestricted personality, he is very composed and prudent. He can’t stand losing and has a strong desire to win in everything, which probably explains his successful career.
