Yoo Seung-ho
Crown Prince Lee Sun
The Emperor: Owner of the Mask is a South Korean television series starring Yoo Seung-ho, Kim So-hyun, Kim Myung-soo, Yoon So-hee, Huh Joon-ho, and Park Chul-min. It aired on MBC TV from May 10, to July 13, 2017, every Wednesday and Thursday at 22:00 (KST). imdb.com