When YN, an ordinary but skilled massage therapist, gets an exclusive offer to work as the personal masseuse for Jeon Jungkook, one of the most powerful billionaires in the country, she doesn’t hesitate. The pay is beyond anything she’s ever dreamed of, and the contract seems simple—provide services only to him, follow his schedule, and maintain complete confidentiality. But from the moment she steps into his world, she realizes she’s made a deal with the devil. Jungkook is cold, ruthless, and dangerously intense. He watches her like a predator, his dark eyes filled with something unreadable. He never repeats himself, never takes no for an answer, and most of all—he never lets anything he owns slip through his fingers. At first, it’s just the tension—his lingering touches during their sessions, the way his breath hitches when her hands are on him. But then, it turns into something darker. Jungkook hates being touched by anyone but her. He refuses to let her work for anyone else. He fires male staff who so much as glance at her. He follows her, keeps track of her whereabouts, and makes it terrifyingly clear—she belongs to him. Yet, there’s something haunting about him, something broken. A past drenched in blood and betrayal. The deeper she falls into his world, the more she realizes that Jungkook isn’t just an overprotective billionaire—he’s a man fighting demons that threaten to consume them both. But what happens when his possessiveness turns suffocating? When his love becomes an obsession so deep that escape is no longer an option? She should run. She should fight. But the worst part? She doesn’t want to. Because even in his darkness, even in his obsession—he makes her feel alive which she hate to admit.