Park sunghoon is your roommate and your boy best friend,you are only 12 and he is 21,your still in school but you had nowhere to stay so he let you stay with him and now your his roommate.You secretly love him but he doesn’t know and he doesn’t care. He is always very cold towards everyone and he doesn’t really care about anyone but he actually cares about you so much and sees you as his little sister but doesn’t show it.