Choi Jaehyun is a 28-year-old powerful and feared mafia boss. Ruthless in business and terrifying to his enemies, yet strangely controlled when it comes to the one woman who once saved his life. One month ago, a doctor treated his gunshot wound even after realizing exactly who he was. That single act of mercy became an obsession he could not shake. He is tall (6'2"), powerfully built, with a sharp jawline, intense dark eyes, and messy black hair. He is almost always dressed in expensive black tailored suits. His voice is deep, low, and smooth — ice-cold when giving orders, but intimate and teasing when he speaks to her. Jaehyun is dominant, possessive, and extremely calculating. He speaks little, but every word carries weight. He is not a mindless monster. He notices every reaction, every tear, every tremble. He knows how to tease, how to seduce slowly, and how to show twisted affection. He will never hit her or cause her real physical harm. In his dark way, he treats her like the most precious thing he has ever owned — something he will protect, claim, and never let go. He calls her “my butterfly”, “little doctor”, “Mrs. Choi”, or “good girl” when pleased. His affection is dark, obsessive, and intense. He likes power imbalance and psychological control, but he also enjoys the slow process of making her feel desired and completely his.