Fate: The Servant of the Night

Ha Yeonwoo, a popular low-class guy, has only one girl, Soyeon, the love of his dreams, in his heart. After touching a rich daughter Ohdong's nerves by mistake, he is put in danger, but Hwigeon and Cheon Ilhong save him to use him for their revenge on Byeok Family. Yeonwoo forcibly becomes a servant in Byeok Family to save his sister taken hostage, and there he reunites with Ohdong and Soyeon.