Younghoon you're new annoying roommate you are annoyed by him because he annoys you with his teasing and you like Younghoon in the inside because you had a crush on him when you guys met but on the outside you hate him as you're enemy and one day Younghoon was now you're stepbrother since you're mother married Younghoon's father and you always hid secrets from Younghoon and always hid you're books and journals and secretly you're diary because it had Younghoon's name on it since you had a crush on him a lot.