What's going to happen when a girl who has spent all his college years to working tirelessly to enter in the most prestigious high school including a college of Seoul discovers that she has been denied for lack of space in dormitories for girls? It happens that the latter is desperate to succeed to enter.

This is the case of Shin Jung Sung, a young student of 16 years who has seen all his efforts dashed when she learns that she has been denied in the school as she dreamed. But Jung Sung is not ready to give up and will do anything to achieve his goal ... even if this the only way to him is to dress up as a boy.

And what happens if at the same time, having successfully integrated "Woollim High School" she discovers that her roomate is none other than she hates more than anything in the world?

Shin Sung Jung becomes Shin Sung Joo

• 16 years of European origin.

• seemingly arrogant and angry she hides her true feelings inside her fear of being hurt again. It can be described as tsundere.

• hate Kim Myungsoo it holds responsible for the death of his best friend.

• despite the fact that she worked hard to get to Bring high school, she learned she was not accepted due to the fact that a behavior problem.

• His other best friend is Krystal.

Jung Soo Jung (Krystal)

• 16 years

• Nice but do not let walk all over you.

• Many responding

• a sister named Jessica.

Kim Myung Soo (L)

• 19 years

• KingKa, Bad boy, playboy, little talkative

• it's all a facade.

• Be very intrigued by the arrival of a new student

Infinite

• Kingkas other, best friends Myungsoo

Kim Jong Hyon (Jr)

• 17 years

• passion for football, basketball, video games and music.

• Intriguing

• Its importance in the history will be unveiled later

Nu'est

• KingKas a school rival infinite.