Baek-Joo-In is a smart, diligent student and has a crush on Ham Sobok, another elite student. However, things start to go downhill when Jooin’s twin brother, Jooyul, turns up to meet Sobok while pretending to be Joo-in. What’s worse, Sobok’s best friend, Lisa, doesn’t seem to like Joo-in one bit. How will it all play out?