Jeonghan Yoon has been called a lot of things-brat, spoiled, dangerously unhinged. The bodyguard industry has another word for him: psychotic. He's a billionaire's son. Beautiful, rich, untouchable-and an absolute nightmare to protect. Jeonghan has never heard the word no-until the new bodyguard Seungcheol shows up. He's everything Jeonghan hates: serious, stone-faced, and completely immune to charm. But he's also hot. Really hot. And worse? He refuses to treat Jeonghan like the center of the universe. Which means Jeonghan has no choice but to test his patience-and maybe his professionalism-every chance he gets.