Everything changes when Aedda, an ordinary girl, moves all the way to Busan with her parents. She spends her summer babysitting and trying to adapt to her new life. Somehow, adapting won't be easy when her neighbour, Jeon Jungkook, is always there to make things seem strange and unexplainable.

This story follows a girl named Dalnim. She's the prettiest, kindest and the most cheerful person anyone has ever met. She's popular with the boys and girls. She has a straight A record and has the voice of an angel. She speaks four languages and might as well be the purest person in the world. At least that's what everyone thinks...