On her 21st birthday, Y/N's life changes forever. Her once normal existence changes when she discovers an underground world straight out of a nightmare. There, she discovers that demons of the night actually exist: dangerous, deadly vampires. Three ethereal vampires take an interest in her. Jimin-the manipulator. Smooth, seductive, and a slick silver tongue. Taehyung-the sadist. Volatile, vicious, and a short temper. Jungkook-the sociopath. Apathetic, indifferent, and a heart as cold as stone. They have sworn an oath to protect her from anyone who would harm her. But what makes her so special? Why has she become the object of their affection? ~~ *NOT POLY* Reader will end up with one of the members of the BTS maknae line. Which one will it be? I guess you'll just have to read to find out ;)