Mask (2015)

Mask is a 2015 South Korean television series starring Soo Ae, Ju Ji-hoon, Yeon Jung-hoon, and Yoo In-young. It aired on SBS from May 27 to July 30, 2015, on Wednesdays and Thursdays at 21:55 for 20 episodes. Ju Ji-hoon as Choi Min-woo, an illegitimate son of the chairman of SJ Group, engaged with Seo Eun-ha.

Byun Ji Sook has always had a difficult existence, since her father is continually in debt and being pursued by loan sharks. She longs to know what life would be like if she had been born into a better family and didn't have to worry about money all the time. When a chain of events leads Ji Sook to Eun Ha, a lady from an affluent family who has a striking resemblance to Ji Sook, she seizes the opportunity for a better life and adopts Eun Ha's identity, beginning to live her privileged life. She meets Min Woo, a chaebol heir who is suspicious of everyone around him. But when he realizes that Ji Sook is not like the other women he has met, he is drawn to her.

Detailed information:

Starring: Soo Ae, Joo Ji-hoon, Yeon Jung-hoon, Yoo In-young

Original release: May 27 – July 30, 2015

Link to watch: imdb.com/title/tt4714786/