To raise money for her younger sibling’s medical treatment, A’Nu sells herself to the Prince’s Mansion. Unwilling to become a concubine, she deliberately makes herself look ugly, only to be chosen by Lou Xuanyi, the notorious heir known as the “Demon King.” A’Nu is always clumsy and getting herself into trouble, yet she possesses remarkable skills and even saves Lou Xuanyi’s life. Gradually drawn to her, Lou Xuanyi begins protecting her at every turn, while A’Nu realizes that he is nothing like the ruthless man the rumors make him out to be. As their feelings grow, the two join forces to unravel the hidden conspiracy within the Prince’s Mansion.
