Jeong Yeoreum is a student in Seoul of Performing Art High School. She's a nice and kind 16 year old teenager, plus she is smart and dilligent. Yeoreum was actually came from America, but her parents move to Korea because of some sort of bussines they need to do. Well, she's not the type to socialize with people very well instead she's a quiet and docile girl who prefers reading books by herself at the library on lunch time. Yeoreum had a friend name Hani, and they've always hang out together. 

One day, a new transfer student came to Yeoreum class. His name is Jeon Wonwoo, a trainee at Pledis Entertainment.