Yun-Ook Jang is a 24-year old freelance illustrator who rents out a room to help pay off her debts. Her tenant is a 17-year old drop out named Bum-Moo Lee who only has a part-time job. Before Yun-Ook knew how old Bum-Moo was, he seemed rather mysterious and cold to her, and the two argued all the time. Then one day, Bum-Moo asks her a most dangerous question: "Do you mind if I like you?"