Susan and Sophie along with Yuan Fang, who grew up together with them, were originally going to study at Green Light Forest, a school with no walls, Green Light Elementary School. However, because they had to move homes, they must leave Green Light Elementary School and go to study at Spencer Royal School of Music. Sophie, who loves her independence, was very unwilling but she still had to go to a school enclosed with high walls - Spencer Royal School of Music. Within the strict Spencer Music School, there is one rule: those who forget to bring their textbooks would receive a beating on their palms.