Noh Young Hak

Two wannabe spies break up when one of them gets fired. Years later, both end up being spies working for different units, so they have to keep their covers up in real life. Gil Ro uses his real identity, hence why he was seemingly fired, to spy on his rich father. So, when Kim Seo Won appears as a new employee, he wonders if she really is just a doppelganger of the woman he loved. (Source: MyDramaList)

Gye Baek was born as the son of Mu Jin, a student and guard of Baekje’s King Mu, but because of his father being falsely accused, he grew up as a commoner in the market streets.There, he meets a merchant named Eun Go and he falls in love with her. One day, after getting caught up fighting in the mountains, Gye Baek is lowered to become a war slave and becomes a prisoner of war for Silla. At Silla, he reunites with Uija who came as an envoy and learns there is a great secret about his father’s death. Though King Uija and Gye Baek have a strong friendship, they both have feelings for Eun Go at the same time. Gye Baek’s loyalty to Baekje and King Uija completes a history page. What will the situation be in the relationship of Uija and Gye Baek with Eun Go in between?