“Is this kid playing with me? Where does she get the nerve to talk back and try to act like my equal?” Five-year-old Seo Yoon-woo, who smiled brightly, feeling all the happiness in the world from a single chocolate. Twelve-year-old Cha Ji-han, who prided himself on being the omnipotent Superman who brought happiness to that little kid. That crybaby might be loud and annoying, but teasing her is incredibly fun. Cute as a rabbit and more fun than a toy… because you are mine. Yes. You are mine. A dark, mischievous urge arose—to bully her and make her cry as much as he wanted. He was absolutely sure of his ownership. And now, the beast has returned.