Yun-Ook Jang is a freelance illustrator who rents out a room to help pay off her debts. Her tenant is a 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. But what's this?! He's only seventeen?! He's just a kid who ought to be in school! Then one day, Bum-Moo asks her a dangerous question: "Do you mind if I like you?"