You ( Kim Jaeyeon ) - Your name is Kim Jaeyeon. You are 17 years old and you are one of the best student in your school. You live with your dad. Your mom died after giving birth to you, so you don't have any memories with your mom, only a picture of her. Your dad take care of you since your mom died so you are pretty close with your dad. At school, you didn.t have any friends because you like to keep things to yourself, it's like you're living in your own world.

100% - One of the baddest group in the town. They have 7 members and they all live together.

Seo Minwoo (25 years old) - Minwoo is the leader of the group and the baddest boy in the group. He's a bad-tempered boy. Even he's the baddest boy but he takes care of his younger brothers very well.

Kim Rockhyun (20 years old) - Rockhyun is the 2nd bad boy but full of aegyo. He makes the other members laugh with his aegyo and jokes.

Jo Jonghwan (19 years old) - Jonghwan is the 3rd bad boy but he's the silent type and can be decent guy sometimes. 

Kim Chanyong (18 years old) - Chanyong is the 4th bad boy. He's famous boy in school because he's the good looking  and y guy among the others but he loves to boss people around.

Woo Changbum (18 years old) - Changbum is the 5th bad boy. He's an honest and straight forward boy.

Jang Hyukjin (18 years old) - Hyukjin is the 6th bad boy. The other members tried to figure out Hyukjin's personality but it seems that he has no personality.

Lee Sanghoon (18 years old) - Sanghoon is the 7th bad boy. He's an athlete and active boy.