Under the Moonlight (Eun Young LEE)

A young man called jawoon, barely survived his escape with the help of ahin. Before he was sure of his feelings for her, ahin left the country in a hurry due to her ailing health. Years later, jawoon is handpicked to join the imperial guard and protect the king, while ahin recovers and returns to Korea. At the same time, a mysterious and elusive thief appears in the capital... Source: WeComics