Sounghyun Is an ordinary girl that lives with her widow mother and lives an ordinary life until HE moves in. A friend of her mother talks about 3 boys who are coming to America to live new lives and are looking forward to renting an apartment. Good news is, her mother has an available apartment upstairs for them to rent. Bad news is, The people currently renting upstairs wont move out until two months later. They're names were Taemin, Key, and Jonghyun. In the meanwhile the boys will be in Sounghyun's room and she'll sleep on the living room couch and live together with Sounghyun and her mother. But once Taemin  laid eyes on Sounghyun he automatically had an interest in her. How will 3 boys share one room? How will Sounghyun get along with the boys? Especially Taemin? Will Sounghyun grow feelings for Taemin?