Akuyaku Reijou wa Single Mother ni Narimashita Futago wo Hikitorimashitaga Koushaku-sama Kara no Dekiai wa Souteigai desu

Unaware that she has been reborn in another world as a villainess, Duchess Estelle suddenly finds her engagement to the Crown Prince dissolved. Determined to start over, she abandons her noble title for a modest life as a commoner, settling in a neighboring country where she takes work at a small restaurant. Six years pass, and Estelle now runs the restaurant herself while lovingly raising Coco and Mia, the late owner's twin daughters. Her hard-won peace is shaken, however, when Duke Frederick appears at her door, introducing himself as the twins' older brother. With an inheritance dispute threatening to drag the girls into its schemes, Estelle agrees to pose as the duke's lover to keep them out of harm's way. What she never anticipates is how deeply the supposedly cold-hearted duke will come to cherish her. Caught off guard by his relentless affection—and still oblivious to the fact that she is living inside a game—Estelle navigates a fake engagement that begins to feel anything but pretend. A delightful romantic fantasy about a bewildered villainess and the devoted duke whose love is far beyond anything she expected.