When 17 year old Lee Sungjong moved to Seoul to attend Woolim Dancing Academy to pursue his dreams on becoming a dance instructor, it doesn't go the way he plans. Sungjong planned to focus on just dancing and let no distractions get to him. But that back fires completely when a certain someone decides to troll in his life.

Kim Myungsoo, or known as poker faced L, comes into Sungjong's life, ruining him completely. Not because he's a bad person, but because he's too perfect. The first time Sungjong laid eyes on Myungsoo, his heart was hooked onto him instantly. You could say it was 'love at first sight'. Sadly though, Myungsoo had no intention on having a relationship anytime soon, for he is far more concerned about his dancing career. But Sungjong doesn't give up. He'll try everything to get Myungsoo's attention.

But will Mr.Perfect distract Sungjong completely, making him off guard and not able to concentrate on his dancing? And will this effect Sungjong's future?