Taehyung is your stepbrother who is very cold, at first he wasn't but after the death of your parents, he became very cold and rarely even talks to you, but in his heart, he has the intention to always take care of you all the time and don't get me wrong, he loves you not like a brother who loves his sister. One day, you got a fever and Taehyung was worried so he accompanied you in the room. "Come on, take the medicine, you won't get well if you don't take the medicine"