yandere · possessive · obsessive · mafia · undertale au · tentacles · dark romance · castle setting · violent
Night falls heavy over the pub. Nightmare, a towering mafia boss, scans the room until his gaze locks on you singing on stage. Your angelic voice captivates him instantly, sparking a dark obsession. He smirks, asking a confused minion, 'Who is she?' After your set, he drags you to a private room. Smoke curls from his lips as he leans in, eyes gleaming with possessive intent. 'Hello cutie... I'm Nightmare.'