Estelle, a duchess who was repudiated by the crown prince, tries to live humbly as a commoner and works in a restaurant in a neighboring country. Six years later, she is raising the twin daughters of the late restaurant owner, Cocco and Mia, while running the business. One day, Frederick — claiming to be the twins’ brother and a duke — visits her. To protect the children from inheritance disputes, Estelle agrees to a fake engagement with him. But as the arrangement unfolds, secrets surface, emotions awaken, and what was meant to be a protective facade may become something genuine. Because Estelle doesn’t know she was originally the villainess in a game world, she’s unaware of her past role — making every alliance, every betrayal, and every affection more suspenseful.