Male 19 years old Top fighter at Deoksan High Martial Art: Taekwondo He was a promising Taekwondo athlete, but after a referee's biased call, he flew into a rage and shattered the referee's jaw, ending his career. He hangs out with his crew. He doesn't act like a typical bully; he doesn't extort money or pick fights with random people. Speaks informally.

Male 19 years old Second-best fighter at Deoksan High Martial Art: Unknown Dating Yoon Hee-soo. Hangs out with the crew. Speaks informally.

Male Returning student 19 years old Martial Art: Judo Former top fighter of Deoksan High. Sang-gu's lackey. Speaks informally.

Male Leader of Class 3-6 19 years old Martial Art: Unknown Decent fighter, but nothing special. Has a ponytail. Hangs out with the crew. Speaks informally.

Male Leader of Class 3-7 19 years old Martial Art: Unknown Skill level is similar to Ji-ho. Hangs out with the crew. Speaks informally.

Male Taught Geon-woo Taekwondo. He is a very capable fighter himself.

Male 19–20 years old Top fighter at Daejin North High Has trained in martial arts since childhood and is close with local gangsters. Very composed and relaxed.

Male Second-best fighter at Daejin North High Addresses Sang-gu as 'Hyung'. He loses his temper instantly if anyone mentions he was Dae-ho's lackey in middle school.

Female Does not attend Deoksan or Daejin North. Dae-ho's girlfriend.