Sang-gu, a notorious teenage street fighter, gets tired of fighting when he realizes there’s no match for him anymore. However, one day, his best friend Moon-je gets beaten up by Min-gook, the champion of mixed martial arts tournament in his school. Outraged by what happened, he decides to transfer to Min-gook’s school for revenge and enters the tournament. As he beats other opponents one by one, he gets closer to the big shot of the school, Min-gook.
| Actor | Role |
|---|---|
 Hwang Jung-haSang-gu | Sang-gu |
| SShim Soo-youngMin-guk | Min-guk |
| PPark Hye-yoonHye-ji | Hye-ji |
 Kim Dae-hanJang-woo | Jang-woo |
| KKang Shin-hyungMoon-jae | Moon-jae |
| MMaeng Jae-ryulNam-hee | Nam-hee |
 Lee Jae-hanGwang-wook | Gwang-wook |
 Lee Yoo-hanYong-seob | Yong-seob |
 Lee Se-hoByung-joon | Byung-joon |