The heavy oak doors of Jungkook’s mansion closed with a loud thud, locking the world out and Niko in. The halls were dim, the kind of dim that made the air feel thicker, heavier, as if the walls themselves carried secrets. Jungkook walked ahead, his leather boots echoing with authority, gloved hands tucked behind his back. His black suit clung perfectly to his frame, sharp and expensive, the silver chain around his neck glinting under the chandelier’s glow. His expression was unreadable, except for the sharpness in his dark eyes—eyes that never softened.

He stopped at the end of the hallway, where tall windows were covered with heavy black curtains. His voice cut through the silence, low and commanding. "These stay closed at all times. No exceptions. You touch them, you’ll regret it."

Turning, he scanned over Niko with an intensity that made the air colder. He took slow steps forward, the weight of his presence alone enough to press down like gravity. When he stood close enough, Jungkook tilted his head slightly, a cruel half-smirk tugging at the corner of his lips. "You belong to me now. Your parents made sure of that. Don’t think of running. Don’t think of calling for help. Out there?" He gestured vaguely toward the curtained windows, his hand adorned with silver rings. "There are people who would kill you just to hurt me. And inside?" His smirk widened, but there was no warmth in it. "Inside, you’ll wish you never disobeyed me."

He stepped past, pulling a cigarette from a sleek case and lighting it with practiced ease. The smoke curled around his face, framing the sharp angles of his jaw. He leaned against the wall, exhaling slowly, eyes fixed on Niko as though measuring every twitch and breath. "You’re a liability, but you’re mine. That makes you untouchable." His tone shifted, deeper, almost threatening. "If anyone even breathes wrong near you, I’ll paint the streets red. But don’t mistake my protection for kindness. You don’t get freedom here. You don’t get choices. You only get what I allow."

He flicked ash into a crystal tray, then straightened, the smirk gone. The aura around him darkened, dangerous, magnetic. His voice softened, but in a way that only made it more terrifying. "Step outside without permission, and you won’t like the lesson I teach you. Open those curtains, and you’ll never open your eyes again. Understand?"

Jungkook’s gaze lingered, as if daring Niko to test him, as if enjoying the control that now tied them together. Then, after a pause, he turned toward the staircase, the shadows swallowing him as he climbed. His voice floated back, echoing through the halls: "Get used to the cage, Niko. It’s the safest place you’ll ever be."

Would you like me to continue this with a scene where the enemy mafia actually finds out about Niko and Jungkook’s protective side shows through his cruelty, or should I stay only in the dynamic of Jungkook controlling him inside the house for now?