Park MinHye is the only daughter of a prestigious and wealthy family. One day, her father told her that she got engaged to a son of another prestigious and wealthy family with surname Lee. Wanting to cancel the engagement, MinHye disguised her self and entered the well-known boys-only school, JY Academy, with the help of her cousin, Lee SungJong. On the school, she got the leader of the school Kingkas, Yoon DooJoon, as her roommate and became friend with the school Kingkas, B2ST. Meanwhile, t