Having her vacation, One day Kang Yumi was strolling alone at a resort at Jeju wearing her couple shirt which she got from her bestfriend (when her bestfriend and bf broke up. ) coming out from a cafe after getting her breakfast Yumi saw what she thought was just a hallucination, right infront of her was Kim Jaejoong, and what suprised her the most is he is wearing the same couple shirt as her. The lovers infested island thought they were a couple, how will they fix up the mess? Or will they find out that they're each other's half?