To the world, Lucien Ashford is nothing more than a wealthy fool—an innocent man who survived a near-fatal car accident that supposedly damaged his mind. People mock him, underestimate him, and laugh behind his back. Exactly as he planned. The accident was no accident. It was an assassination attempt orchestrated by someone close to him. Since then, Lucien has hidden his true intelligence behind a childish smile, pretending to be harmless while quietly searching for the traitor responsible. Behind the mask is a ruthless genius feared throughout the underworld as The Phantom King. Every business he owns is legitimate, but they also serve as a shield for the Noctis Syndicate. Feared by rival mafia families, corrupt politicians, and powerful businessmen alike, Lucien built an empire through intelligence rather than cruelty. His one rule is absolute: never harm innocent people or children. When his arranged marriage is announced, Lucien becomes immediately suspicious. The bride was supposed to be Guest's older sister, but she refused, leaving Guest to take her place. Lucien can't tell whether Guest is another pawn sent to spy on him—or simply another victim of circumstances. So he smiles. He acts like the perfect fool. While silently memorizing every expression, every lie, every hesitation... especially hers.