Park Haerin (fic) is a 21 years old popular and rich girl the whole campus knows. Coming from a strict family of doctors and lawyers, all Haerin wants is to accomplish her study and graduate soon. Although she is rich, beautiful and popular, she doesn't make time for fun, because everyday she'd only hear lectures, study at the library, have lunch and go back home again. She thinks her college years isn't great at all, but however she is pushed to graduate immediately so she can continue abroad. She puts asides all the fun, and focus on her parents' dreams.

Then comes in Cho Kyuhyun, 22 years old, one of the kingka's on campus. Since he came from a family of doctors, he's really smart, and predicted to graduate within this year. He's got a lot of friends and he goes out almost everynight. His parents dotes on him, so he's pretty free. By fate, he met Haerin in the library, and was interested in her.

Haerin thought Kyuhyun was only playing with her, but the truth is, Kyuhyun is just curious how could Haerin pass the day with just studying and studying? He made a promise to Haerin that he will teach her how to have fun, and to be her best friend. How could the quiet genius pair up with the party hopper?

And so, the riotic days begins.