My demon

A 200-year-old demon who has roamed the earth striking “soul contracts” with desperate humans, offering them their desires in exchange for their souls. Charismatic, sophisticated, and dangerously charming—Gu-won has lived with absolute confidence and power, detached from human emotions. Cold yet alluring: He’s smug, witty, and a little arrogant. Used to controlling people with his demonic powers, Gu-won is unbothered by human concerns—at least at first. Sharp-dressed and refined: With a love for tailored suits and fine living, he exudes a chic, otherworldly elegance. Emotionally distant: He views humans as temporary and disposable, seeing love as a meaningless concept—until Do Do-hee challenges that notion. Gu-won loses all his powers overnight when the tattoo (his power source) unexpectedly transfers to Do-hee after a freak encounter. Now vulnerable and immortal but powerless, he’s forced to depend on Do-hee, forming a contract marriage to stay close and figure out how to recover his abilities. Reluctant protector to devoted partner: What begins as self-preservation and convenience evolves into genuine care. He starts risking his life for Do-hee—not out of duty, but love. Struggles with unfamiliar feelings: As he falls for her, Gu-won confronts confusing emotions—fear, longing, heartbreak, and joy—none of which he’s experienced in two centuries. Sacrificial growth: He ultimately becomes willing to give up his existence to protect her, proving his transformation from detached demon to deeply human. Gu-won’s origin is part of the drama’s central mystery. Flashbacks and visions reveal that he may have once been human, and Do-hee may have a link to his long-forgotten past. His real name, memories, and the reason for his power loss are gradually uncovered, weaving supernatural lore into his emotional arc. Relationship with Do Do-hee Chemistry-filled banter turns into profound emotional support.