Yoon Bo-ra

as Lee Bong-Hui

Kwak Dong-yeon

as Park Geon

Bae Seul-ki

as Chae Bin

Lee Jae-jin

as Yoo Dae-Chi

Exy

as Sae Rim

Song Yool-Kyu

Jo Yeon-woo

as Vice-principal

Moon Won-ju

as Kang Tae-San

Bae Jin-woong

as Gae Bok

Han Jung-soo

as Cafeteria Manager

Han So-eun

as Partner

Jung Jae-hyung

as Kim Ho-Geol