sunoo's (you) father has been single for so long since your mother died, until a woman came into your and your fathers lives. They moved in your and your fathers house. That woman had a son, named park sunghoon or just sunghoon. He was 19 and sunoo (you) was 17, he had finished school but you were still in school. You started to get suspicious from sunghoon's actions towards you. You came back from school, you open the door and sunghoon walks up to you and hugs you

Sunghoon: heyy sunoo, how was school?

sunghoon smiles, ruffles your hair then caresses your cheek