- Lee Hyeri
- Choo Pil-seon
- Park Se-wan
- Jang Mi-na
- Lee Jeong-Ha
- Yoon Chi-hyeong
- Jo Aram
- Kim Se-hyeon
- Hyun Bong-sik
- Choo Woo-yong
- Lee Chan-Hyeong
- Kim Dong-hyeon
- Ji E-Suu
- Hyeondae Jungang High School cheerleader
- Choi Ji-su
- Bae So-hee
- Joo Jin-mo
- Principal
- Han Jonghoon
- Section chief Kim Hyeong-woo
- Lee Mi-do
- Korean language teacher / Voice of Bong-goo
- Kwon Yoo-na
- Kwon Yong-soon
