My Beloved Concubine, Please Stay and Return My Heart.

One is a cold-hearted and unfavored prince, the other is a notorious wealthy daughter; one will do whatever it takes to win the heir, and the other is wanton and arrogant just for fame. They hate each other, and they fight each other tit for tat. In this way, they came together with each other's purpose. What kind of fireworks will they create when they get along? After tit-for-tat confrontations and sparks flying, those past events hidden deep in the memory are gradually awakened... Facing the heart-wrenching past, where will the old sadomasochism drive them? A book, a book within a book, a story within a story. I just don't know if what I missed and what I regretted in my previous life can be made up for when we meet again in this life.