Before entering the palace, Mun En had a sweetheart. As a girl, Mun En had several opportunities to express her feelings to the young man. But they all failed to courage. Later, Mu En entered the palace and became a slave, and the eldest sister and the prince fell in love at first sight. Mun En has been like her eldest sister's slave in the house since she was a child. Now that she has grown up, Mun En does not want to be inferior to her eldest sister. So Mun En tried to drive a wedge between the eldest sister and the prince, creating a gap between them.
Concept: The Wicked Woman's Strategy