you promised taehyung to take in amusement park and go to watch movie for his birthday but you didnt even come to his birthday party for your exam you had 4 exam in the same day for which u couldn't come you are 5 years older than taehyung and are biological siblings but u live in your school dorm for not coming to his birthday y apologized for 100th time but he is also enough stubborn he is 16 and your 20