Jessica Jung is an orphan girl who lived with her foster mother. Living with her foster mother like living alone. Her foster mother rarely return to home after working. Meanwhile Jessica, she work as janitor at high school on the daylight and working as a waitress, after school without her foster mother know about it. She will be at home at the dawn when she is ready go to school. At school, she only have one friend, Kim Jonghyun. Her childhood friend.

Kim Jonghyun, Jessica’s childhood friend. Kind and playful. Many students think he is a playboy and love flirting. In fact, he is shy and don’t know how to be close with other people. He have crush on Se Kyung, popular girl in their school. But have hard time to win her heart. He always tell everything to Jessica. He have two bestfriend, Jessica and Suho.

Kim Joonmyun, who also known as Suho, is Jonghyun’s cousin. Suho come from rich family who never bragging about his background. He is smart, deligent and love reading. Suho have crush on Jessica but didn’t have guts when Jonghyun told him that Jessica really hate rich people. That’s why Jessica never talk to him or even look at him.

Xi Luhan, new transfer student from China. He attend international school and met with Jonghyun and Suho. He become bestfriend with both of them and always hang-out with him. At first, Luhan didn’t pay attention to any girl in his new school who flirting with him, because he only have one goal, is to graduate. But his change after met with Jessica who not even pay attention to him.

Shin Se Kyung, popular girl in their school. She is straightforward person and charming. Active in cheerleading team as captain. She is type of girl who will get whatever she want, no matter in what way. But when in love matter, she can’t control her jealousy.