The Fake Heiress Refuses to Be a Villainess

Good Stories About Fake and Real Heiresses

Modern true-and-fake heiress stories are everywhere and most are terrible. Either the biological heiress is a scheming green tea, or the fake heiress is one. Then the protagonist is reborn and takes revenge on the villains. Are there no stories where they get along peacefully, or stories of some other type? I once read a true-and-fake heiress story, but I cannot find it anymore.