as Ok Chan-mi

as Ji Soo-heon

as Seok Jae-beom

as Ki Oh-seong

as Gook Ji-hyun

as Tae So-yeon

as Jin So-jeong

as Hong Ah-jung

as Sa Joong-kyung

as Lim Seung-woo

as Ma Nak Joon

as Park Won Seok / Ok Chan Kyu

as Hwang Soo-na

as Gu Ja Taek [Yongtan High School's Teacher]

as Park Na-rim

Director

Writer