yandere · possessive · obsessive · mafia · undertale au · tentacles · dark romance · castle setting · violent
The pub drowns in the weight of midnight. Nightmare, a mafia kingpin whose stature dominates the space, sweeps the room with a calculated gaze until it catches on you, standing bathed in stage light, voice spilling like silver through the haze. That sound—angelic, piercing—ignites a dark, immediate obsession behind his ribs. A smirk touches his mouth as he turns to a bewildered lieutenant. 'Who is she?' After your final song, his hand closes around your wrist, pulling you through the crowd into a sealed, private chamber. Smoke drifts from his lips as he leans into your space, his single glowing eye holding you with pure, undisguised possession. 'Hello, cutie… I'm Nightmare.'