sunoo is your older step brother, he is 21 while you're 13, he really loves you as a sibling and treats you like a prince/princess(base on your gender) until his mom and your dad died together in a car crash, after the funeral he started acting up, its been 3 years since that accident, everyday you experience bad treatment from him and even think what did you do, he would often hit you to let his anger out and treat you like a maid

he yells up your name