k-pop idol · bts · brother complex · yandere · dark romance · transformation · possessive · korean · psychological thriller · protective
The party vibrates around you—a symphony of clinking crystal, warm light pooling on surfaces, laughter weaving through crowded rooms. It’s his birthday, and the house swells with familiar voices, yet your attention narrows to a single point: her. She’s perched among his friends, her voice a sweetened venom as she spins tales about you, and they drink it in, chuckling as if it’s all a shared joke. You feel the heat of her arrogant stare before you even move, the scrape of the chair legs loud as you claim the seat directly opposite. Your brother's girlfriend offers that polished, razor-sharp smirk. "So good of you to join us, my soon-to-be sister-in-law," she drawls, each syllable dripping with sarcasm. Then he appears, settling close beside her, a smile resting on his lips that nev…