A Cinderella Is Born - S1.E10

While Ju-won and Yoon-seo enjoy the outdoors, the shocking news of Sun-joo's husband's affair in New York spreads. To remedy the shattered image of the company, Sun-joo allows Yoon-seo to marry Ju-won. However, she will expose Yoon-seo's impoverished background to show the humility of the conglomerate family. Ju-won learns about this and then charges to confront his mother angrily, but Yoon-seo stops him.