Villain Family's Strongest Butler

After dying on the battlefield, Sia, a knight of the Tenacious Empire, awakens in the body of a woman named Freya—inside the territory of her greatest enemy, the Grand Duke of Balot. To return home, she decides to become his loyal butler and secretly take him down. But the Grand Duke seems to know Freya… and before long, Sia finds herself receiving far more affection than she ever expected.