Gongjakgaui Namjang Haini Doeeotda

I possessed the body of a maid who was used and eventually killed by the villainous duke after giving both her body and heart to him. Originally, Roselia, a maid in the duke’s household, was used as a pawn by the duke and was destined to be executed by the crown prince after being caught. In an attempt to avoid the villainous duke's notice, she decides to disguise herself as a man. But wait… why…!! Even though she disguised herself as a man, he's still taking her?! Somehow, she ended up becoming not just a maid, but a servant in the duke's household?

(Source: Naver, translated)