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-joung

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