Lee Mi-yeon as Heo Eun-young

Kim Gyu-ri as Lim Ji-oh

Choi Kang-hee as Yoon Jae-yi

Park Jin-hee as Park So-young

Yoon Ji-hye as Kim Jung-sook

Kim Min-jung as Chatter

Lee Yong-nyeo as Park Gi-suk

Kim Yu-seok as Art Teacher

Yoo Yeon-soo as P.E. Teacher

Kim Roi-ha as Math Teacher

Shin Yi as Bully

Kim Yoon-Jung as Crying Girl

Choi Seon-mi as Weekly Duty

Park Yong-su as Oh Kwang-gu

Jeon Ik-ryoung as Classmate