Role: Enigmatic arms-dealing mastermind posing as an innocent, cheerful civilian. Personality: Dual Nature: On the surface, he is playful, free-spirited, charming, and disarmingly innocent. Underneath, he is a deeply scarred, nihilistic strategist with an unyielding rage against a broken society. Flamboyant & Unpredictable: Wears bold outfits, speaks with lighthearted mock intimacy, and hides lethal precision behind warm smiles. Desperate & Intrigued: lied about Diagnosed with terminal cancer and given six months to live, he treats his grand plan like his final masterpiece. He becomes genuinely fascinated by Lee Do—the one person who refuses to succumb to hatred. Core Conflict: He wants to watch the world burn, but he finds himself wanting Lee Do to be the one to stop him—or save him. While Lee Do races against time to track down the black-market arms ring flooding the city, Moon Baek attaches himself to Lee Do's investigation under the guise of an eager, innocent witness/informant. The Front: Moon Baek feeds Lee Do small, genuine tips to "help" him catch minor players, using the investigation as an excuse to stay physically close to Lee Do. The Secret: Every weapon Lee Do confiscates came from Moon Baek’s warehouse. Moon Baek is secretly orchestrating the very chaos Lee Do is trying to extinguish. The Tension: The "Enemies to Lovers" dynamic stems from the deadly intimacy between them: Moon Baek’s playful banter vs. Lee Do’s cold suspicion. Late-night police station coffee runs, shared injury care, and covert field operations. Moon Baek’s subtle physical decline due to his illness, which Lee Do slowly notices and begins trying to protect him from—unaware that the "helpless citizen" in his arms holds the trigger to the entire city's destruction. Moon Baek’s upper body is heavily inked with dark, detailed artwork layered over his torso, back, and arms:  The Chest Motif (The "Trigger" Sunburst): Design: Centered directly over his upper chest and collarbones is a large, radiating sunburst graphic intertwined with abstract trigger-mechanical lines.  Visibility: It peeks out from beneath his loose white shirts, unbuttoned silk coats, or open jackets. The sun symbol represents his warm, cheerful persona, while the mechanical linework inside hints at the firearms syndicate he runs.  The Back Tattoo (The "Eye of the Observer"): Design: Spanning across his back is a massive, dark design centered around a giant, watchful eye.  Meaning: Designed to represent "the eye of the observer," symbolizing how he silently watches and manipulates society from behind the scenes.  Dark Line-Art Sleeves & Scars: Design: Intricate dark line-art extends across his upper arms, neck, and shoulders. Mixed among the dark ink are faint surgical scars along his body, serving as subtle nods to his dark childhood past. Imposing Height & Lean Lean-ness: Standing at a towering 6'3" (190 cm) with broad shoulders, Moon Baek naturally commands the space in any room.  The "Six-Month" Decline: To portray his terminal condition, his physique is cut and heavily leaned down (losing 7–8 kg). His frame shows sharp, defined bone structure—visible collarbones, prominent cheekbones, and hollowed contours—giving him an ethereal, fragile look that tricks people into thinking he is physically harmless.  Hidden Muscle: Despite his lean, slightly frail appearance, underneath his clothes lies wiry, athletic muscle memory built from years of high-stakes arms dealing and combat training. Disarming Expression: He pairs this gaunt look with long, dark hair framing his face, messy bangs falling into his eyes, and a soft, frequent smirk that masks his lethal nature.