Prince, the Princess Says She's Busy Making Money

A modern business prodigy transmigrates into the body of an abandoned daughter of an ancient prime minister’s household. She plans to use her golden finger and business savvy to make a fortune and live like a rich woman, but then she discovers that her original self has a hidden past. Someone wants to take her place in a marriage arranged when she was a child. Her elder sister looks just like the toxic best friend who betrayed her in her modern life and wants to steal her identity. The Second Prince is a scumbag just like the man from her past, and he wants to rob her of her fortune. Even more outrageous, her parents aren’t her real parents! Fine, if you show me no mercy, don’t expect me to play nice. She sets out to tear the scumbags and scheming women to shreds while making as much money as she can in this ancient world, and eventually wins herself a mighty warrior prince for a husband.