Kim Junhui was never popular. In fact, she was the school's biggest loser. No one dared to approach her, afraid she would rub off on them. 

However, Kim Myungsoo was always picked on for being smart but he was also useful as he was the one who completed all his bullies' homework.

One fateful night turned everything around. Kim Junhui was suddenly smart. In every class she responded. All the attention was directed towards her. Since then, guys started to chase her, trying to court her.

Meanwhile, Kim Myungsoo being a loser was fitting for him. No one bullies him anymore as most of the guys attention was with Junhui but what bothered him was the few giggling ladies who kept staring at him. To them, him being a loser was cute.

Before the change, the two didnt know each other but everything changed. Attentions were steered towards them so ofcourse they knew each other. 

They realized it. Their life was exchanged but they way the lived it was different. What would happen then?