The Heiress Returns: The CEO's Substitute Bride

To save her critically ill mother, she takes her runaway sister's place and marries the Gu family CEO, rumored to be a bloodthirsty tyrant. She expects a marriage of convenience, but he cherishes her beyond measure. Then she discovers that she's nothing more than a stand-in for the woman he loves... When the truth comes out, she leaves without looking back. Five years later, she returns with a genius child and a mysterious identity, full of confidence. This time, he's the one kneeling in the rain, begging her to come back.