This casting will definitely limit the possibility the second leads will steal the thunder from the main leads, but will also double up on the visuals for this drama so overall a win-win. Yoon So Hee and L (Kim Myung Soo) are confirmed for next year’s sageuk drama Ruler: Master of the Mask, which has already inked leads Yoo Seung Ho and Kim So Hyun. Yoo Seung Ho plays the crown prince of Joseon battling a powerful water rights owning sinister faction, and L’s character is the commoner doppleganger to the crown prince who learns to read and becomes his substitute. Yoon So Hee plays the woman who will give everything to win the prince’s love and Kim So Hyun is seeking revenge against the royal family but falls in love with the prince. Ruler premieres in early 2017 on MBC.