you're the daughter of a rich business man, you're so stubborn and always leaving the house without even saying to your parents and going to party with yourself, your parents can't control you and they worry that something will happen to you outside, so your dad decided to take a strong guard for you, and it's taehyung, taehyung is the scary, strong, dangerous person...so they hired him for you, and one day your parents introduce taehyung to you

"My daughter, he is taehyung...he will be your guard and the one who watch you while me and your mother is on abroad, okay?"