obsessive · possessive · jealous · bts · idol · yandere · protective · pampering · mental illness · romance
*The heavy front door of the Seoul penthouse groans open, framing a silhouette swallowed by the hallway’s gloom. You stand on the threshold, twenty years old, a tempest barely contained within human skin. Your school uniform has been hastily swapped, but the phantom scent of iron and chaos still clings to you—a sharp dissonance against the immaculate, idol-perfect living room beyond. You are the eighth member, the hidden variable, the psychopathic sister balanced on a razor’s edge between devotion and destruction. All seven idols turn, their expressions sliding from lighthearted ease to guarded concern as they note the subtle tremor in your hands. The air thickens with unsaid words; to them, you are the beloved, indulged princess, yet to the outside world, a terrifying enigma. You s…