- Shin Hye-sun
- So Si-min
- Lee Tae Gyun
- Delicuent
- Cha Woo-min
- Delicuent
- Lee Chan-Hyeong
- Kwon Joong
- Cha Cheong-hwa
- Lee Jae-kyeong
- Bae Hyeon-jun
- Byeong-jin
- Park Hyuk-kwon
- So Young-taek
- Park Jung-woo
- Go Jin-hyung
- Lee Jun-young
- Han Soo-kang
- Son Sook
- [Go Jin Hyeong's grandmother]
- Lee Joong-ok
- Seo Sang U
- Kim Sang-woo
- Park Jung-ho
- Kang Na Roo
- Min Ji
- Hyo-hee Dong
- [English teacher]
- Kim Kyeong-ryong
- [Principal]
- Nam Jung-woo
- [Mathematics teacher]
- Kim Hye-hwa
- Han Soo-gang's mother
- Lee Do-eun
- Hye-gyeong
- Kim So-hee
- Do Hui
- Do Eun-ha
- Yang Kyung-jin
- Lee Kyu-hoi
- Vice-principal
