Synopsis：Hong Dan, the court lady charged with teaching Crown Prince Heon the forbidden arts of the night, hides a dangerous secret—she is still a virgin. As rumors swirl, their risky lessons continue, and the two slowly awaken to their true feelings for each other. But when Crown Princess Seryeong senses their growing intimacy, she tightens her ruthless grip and sets a cruel plan in motion. In the end, Seryeong’s scheme exposes Dan’s true identity, and Dan is cast out of the palace in disgrace…