When Luhan was in the hospital he had a crush on Yoona but Luhan did not know that his crush was Yoona. Yoona pretended to have an amnesia because she wants to start a new life. Yoona's parents are in an other country and her parents never came back. Now that they are all grown-ups, Luhan is living by himself, also Yoona. Luhan fell in love with Yoona and so did Yoona but Luhan's girlfriend is Seohyun and Seohyun pretended not to know Luhan because they already broke up. What do you think will happen to the story? Will Luhan and Yoona confess their feelings to each other? Will Seohyun love Luhan until they bring back their relationship? Will Luhan know that her older sister is Taeyeon? Will Yoona meet her parents again?