The story "Loving U" is actually from the title song of the group Sistar which is "Loving U".

In the story, their is a girl that has a crush on their school's bad boy that ends up to be her boyfriend..

Characters 

 Lee Minna ( You )

- has a long black hair, have a brown eyes, and is 62 inches tall

- tough, shy, independent, only thinks of her bias and to date them

- you are Sungjong's little sister

  Kim Myungsoo 

- is 180 centimeters tall

- *let's say in the story. he has a really dark personality (that makes him a bad boy) and hates crowds.

   Lee Sungjong

- in the story, he is your older brother and is really protective especially to his little baby..
that would be you..