Mask (2015)

Ji-Sook and her family facing a difficult situation because of her father and brother loans and being chase by loan sharks. When a series of thing happen, Ji-sook have to change her identity and live as mask of Eun Ha (Eun-ha is the daughter of a congressman and fiancée of chaebol heir) because she look exactly like her. Min Woo, a chaebol heir who always doubt and mistrust people around him but he realizes that he is love with Ji-sook because she is different from the other women he has met. How long ji-sook hides her true identity and after knowing can Min Woo accept her...