리바운드

안재홍

Kang Yang-hyun

이신영

Cheon Gi-beom

정진운

Bae Gyu-hyuk

김택

Hong Sun-gyu

정건주

Jung Kang-ho

김민

Heo Jae-yoon

안지호

Jung Jin-wook

이준혁

Teacher Lee

Kim Hoe-jin

Messy hair

김수진

Gyu-hyuk's Mother

강애심

Principal's Wife

민무제

Gi-beom's Father

최정윤

Gi-beom's Mother

배성일

Teacher 1

강신철

Teacher 2

유인혜

Teacher 3

송창규

Teacher 4

장현성

Yongsan High School Coach

박상면

50s Man

박재민

Sportscaster