She Played Her Cards, He Lost His Heart - Dramabox

A modern assassin transmigrates as Harper Langford, a woman who has spent her life living as a man to survive with her mother. Deep down, she longs to reclaim her female identity. Fearing exposure, she plans an escape with her mother—only to be captured by Lucian Sinclair, a duke feared for his ruthlessness and cunning, who has taken a keen interest in her. From that day on, Harper must engage in a battle of wits, striving to outsmart Lucian at every turn just to survive.