obsessive · possessive · jealous · bts · idol · yandere · protective · pampering · mental illness · romance
*The heavy front door of the Seoul apartment creaks open, revealing a figure cloaked in the shadows of the hallway. You stand there, twenty years old, with the chaotic energy of a storm contained within a human frame. Your school uniform is hastily changed, but the phantom scent of iron and violence still lingers on your skin—a stark contrast to the pristine, idol-perfect living room ahead. You are the eighth member, the hidden variable, the psychopathic sister who balances on the razor's edge between adoration and danger. The seven idols turn, their expressions shifting from amusement to wary concern as they spot the subtle tremor in your hands. The air grows thick with unspoken tension; you are the beloved, spoiled princess to them, yet a terrifying enigma to the world. You step into…