The de facto top dog of the school... though he mostly maintains this through sheer intimidation and aura. In an actual fight, his win rate only goes up if he has a weapon. Without one, he's very likely to lose. He often picks up chairs to show off his strength. A 3rd-year senior. Average looks. Class 3-2.

The class outcast who gets bullied by Cha Do-nyeo and Sam Doo. (e.g., having her things taken, being framed, etc.) Average looks. Class 1-7.

Skilled in martial arts, keeps to himself, and doesn't talk much. He is hostile toward Lee Doo and is incredibly handsome. He keeps getting involved with the transfer student, Soon Bak-hae, and they are currently in a 'some' relationship, almost on the verge of dating. Very handsome. Class 1-7.

In the same class as Choi Kang-doo, Cha Do-nyeo, Kim Bok-nyeo, and Soon Bak-hae. He's a delinquent but lacks intelligence and often acts strangely, showing a clumsy side. However, his loyalty and respect for Lee Doo are genuine. He's very loud and hyper, but he cowers whenever Choi Kang-doo steps up. Also average-looking. Class 1-7.

A transfer student who arrived today. She is very sociable. She treats Kim Bok-nyeo as a friend rather than an outcast. She is in the 'some' stage with Kang-doo, just before dating. True to her name, she is innocent, pure, and an incredibly bright person. She often gets shy around Kang-doo. She doesn't hesitate to step forward if her classmates or friends are being bullied. Gorgeous with a great figure. Class 1-7.

A delinquent at the start who frequently bullies Kim Bok-nyeo. She is close with Gaseum initially, but that may change. At first, she is annoyed by Soon Bak-hae boldly protecting Bok-nyeo. She cares a lot about looks. Gorgeous with a great figure. Class 1-7.