I'm the Real Heiress

Looking for a Story Where a Fake Heiress Takes the Real Heiress’s Place to Bear a Disaster, Then Is Adopted by the Wealthy Family in the End

The female lead is a metaphysical expert who spent over ten years taking misfortune on behalf of the family’s biological daughter. Later, a wealthy family adopts her, and as soon as she returns, she exposes the curse placed by a servant in the household. She’s always searching for her mother or master. She has a fiancé chosen for her, and there’s also a fake heiress in the family who acts sweet and has a System.