I Became a Duke's Male Servant summary: I woke up as a maid in a tragic romance—a woman who gave her heart and loyalty to the scheming Duke, only to be discarded and executed. Roselia, now a servant in the Duke's household, is destined to become a pawn in his grand game, ultimately betrayed and exposed by the Crown Prince, the male lead, leading to her public execution. To avoid catching the Duke’s attention, she takes a bold step—disguising herself as a man. But wait... why is this happening?! Even in disguise, the Duke insists on keeping her close. Somehow, instead of being a maid, she ends up serving as a manservant in the Duke's household. "This wasn’t part of the plan!" Caught in a web of danger, deceit, and unexpected roles, can Roselia change her doomed fate?