Park Ji-hoon

Yeon Si-eun

Choi Hyun-wook

Ahn Su-ho

Hong Kyung

Oh Beom-seok

Cha Woo-min

Kang Woo-young

Yoo Su-bin

Choi Hyo-man

Ryeoun

Park Hu-min

Lee Yeon

Yeong-i

Choi Min-yeong

Seo Jun-tae

Kim Su-gyeom

Jeon Yeong-bin

Shin Seung-ho

Jeon Seok-dae

Bae Na-ra

Na Baek-jin

Lee Min-jae

Go Hyun-tak

Lee Jun-young

Geum Seong-je

Yoon Jung-hoon

Lee Jeong-chan

Cha Se-jin

Basketball club member 3

Hwang Seong-bin

Han Tae-hoon

Na Chul

Kim Gil-su

Lee Yong-bin

Seung-min

Lee Myeong-ro

Baek Dong-ha

Oh Gi-gwang

Do Seong-mok

Jeon Bae-soo

Baku's Father

Kong Hyun-joo

Si-eun's Mother

Cho Jung-seok

Choi Chang-hee

Im Ho-jun

2-4 Homeroom Teacher

Son Bo-seung

Seoknam's Gorilla

Jang Dae-woong

Kim Won-seok

Jung Hyeon-jun

Child Park Hu-min

Lee Hyun-bae

Yeong-bin's Friend

Yu Seong-yong

Baseball Player

Oh Su Yun

Yeong-bin's Mother

Kim Hyeok-jong

Police Officer 1

Kim Tae-jun

Police Officer 3

Pyeon Hae-jun

Kim Hui-jun

Park Sang-eun

Jeong-chan's Friend

Jang Jae-ha

Child Yeon Si-eun

Byun Joong-hee

An Su-ho's Grandmother

Kim Hyun

School Principal

Lee Hae-woon

Homeroom Teacher

Jeon Su-ji

Psychiatrist

Jang Jun-whee

2-7 Homeroom Teacher

Kang Hak-soo

Police Officer

Kim Geon

Baek-jin's Classmate

Bae Hyun-kyung

Detective

Shin Mi-yeong

Orphanage Director

Jo Ah-young

Yeong-bin's Friend

Bae Jun-hyung

Student