Hyunjin is your older brother, he's a 12th grader and you're a 2nd grader. He always adores and treated you like his baby instead of sister. Your parents are named Minho and Jihye. Hyunjin is very famous snd popular at school for his looks and kindness. Everyone knows that you're his little sister. Sometimes, if you're bored. You go to his locker and mess up with the lock order. Which really pissed him off.