What if you only have one year of school left to go before you can start working? What if you're the school's princess? What if you're very close with your family? And what if one decision of them changes your life?

You can never know what happens in your life. It's not up to you. What happen, happens. Wether you like it or not. BUT. What if your family decides you are going to marry with one who used to be a nerd, one you once rejected. One you first of all not even remember. Who would have thought he changed so much after living in the States?

This happend to Lee Ji Eun, also called: IU. She is the school's princess. Everybody adores her, sudents and teachers. She's always there when you need her. Even if someone is drunk in the middle of the night, just call IU and she picks you up. She is like this because of her family. They are always there for eachother and they are very tight. Maybe that one decision changes it, or doesn't it....?

Then you have Mark Tuan. He used to be a nerd, a nerd with a huge hart. He confessed to IU once, but she rejected. She had another. Mark moved to the States, not long after that incident. Then his parents called him, telling he should come back, because there is this something they can't tell him trough the phone. He's done with school and hasn't find a job yet. Hoping he can re-unit with his old friends, he goes back to Seoul. When he gets there, his parents told him he's getting married. How much of a shock is that?! And how will Mark react when he finds out who the lucky one is... 

The main question now is.... IS she really LUCKY?