Kim Jieun; A competitive 18 years old girl who lives with both of her parents. She has a step brother, but he doesn't live in the same house. Jieun is also smart and athletic in school. She is in the best class and the captain of floorball. She may seem cold and fierce, but in actual fact, she is full of aegyo especially if you are special to her.

Choi Minho; A competitive 19 years old guy who lives with four other guys. He is like the usual kingka- good looking, cool, charming, complete jerk, full of himself, loved by the whole school(especially girls), etc. Smart and athletic in school. He is the captain of soccer and also the president of the student council.

Bang Yongguk; 19 years old president of Sports and Lifestyle. He has this not so little crush on Jieun since they were little. He only shows his warm side to Jieun. Others will be revealed throughout the story. (Y)