Ahn Heewon is just an ordinary girl.

There is nothing interesting in her look, the way she wear, absolutely plain. She's actually a daughter of a President of a big company in South Korea, even though doesn't look like one. Her parents doesn't have any big hopes for her. Because, there's nothing perfect from her, nothing can they brag from her. 

Actually, her parents are still mourns over her big brother, Heesuk, that died 5 years ago because of a car accident. They can't accept the fact that Heesuk, their perfect child is no longer in this world. Heesuk is handsome and good-looking, he's kind and down-to-earth person, smart or even a genius. And, he really loves his little sister. The accident that took his life 5 years ago was because Heewon. She want to sneak out from the house and Heesuk helped her, but when they're ride taxi and ready to go, a truck lost his track and crashed the taxi.

Because of that, Heewon willing to do everything what her parents want her to do. To make them see that they still have hope on her. She's already learn 10 kinds of languange, she can play 5 kinds of instruments, she can do any kind of dance, she can sing, she can draw....

But she's not perfect in any of it.

But what if, the only one she can do is, do the arranged-married, with his parent's friend's son, and he turns out to be The Bully Kim Seokjin! The one that always bully her since her 7th grade of school. The one that always appear in her nightmare. What will Heewon do? If the arranged-married is the only one way prove that she can help her parents.