how many episode is ruler master of the mask
The Emperor: Owner of the Mask The Emperor: Owner of the Mask[2] (Hangul: 군주-가면의 주인; RR: Gunju – Gamyeonui juin; lit. Ruler – Master of the Mask) is a South Korean television series starring Yoo Seung-ho, Kim So-hyun, Kim Myung-soo, Yoon So-hee, Heo Joon-ho and Park Chul-min. It aired on MBC every Wednesday and Thursday at 22:00 (KST) from May 10, 2017 for 40 episodes.[3][4][5]