Kim SunJi was known for her disobedience in school and everything else... Unlike everyone else, she's born from a rich family in Seoul. The Kim's knew pretty well that their daughter has a  bad record at everything else. So they set her for an arrange marriage.

Park Chanyeol, a nerdy but handsome boy in school, son of the Park Group of Companies study hard for his exams and he's very hardworking, at such a young age he is already helping his parents at work. Doing papers for them and everything else. But he's not lucky with relationship and at the tender age of 17, he hasn't experience love....yet.

Little did SunJi know, she's gonna be on a big trouble....very soon.