Shim Kyu-hyuck

Park Hyung Seok (Small) (voice)

Han Shin

Park Hyung Seok (Big) (voice)

Ryu Seung-gone

Lee Jin Seong / Park Jong Gun (voice)

Jeong Jae-heon

Vasco / CEO / Lee Nam Su (voice)

Nam Doh-hyeong

Jin Ho Bin / Jang Gi Seok / Kim Mae Sik / Park Bum Jae (voice)

Hwang Chang-yung

Pyun Deok Hwa / Lee Tae Sung / Oira (voice)

Sa Moon-young

Park Ha Neul / Female Student / Female Extra (voice)

Lee Kyung Tae

Park Ji Ho (voice)

Kim Hyeon-uk

Lee Hyun Do / Go Jeong Gi / Kim Seul Bum (voice)

Lee Gyu-chang

Na Yu Eop / Park Han Gyul / Homeroom Teacher (voice)

Bae Jeong-mi

Choi Soo Jeong / Deok Hwa's Grandmother / Female Student (voice)

Kim Ok-kyung

Hyung Seok's Mom (voice)

Dae Woo Lee

Art Direction

Pak Tae-jun

Original Series Design

Lee Jae Bum

Storyboard Artist

Moon Hoo Young

Storyboard Artist

Jo Byung Hee

Storyboard Artist

Park Ju Hyeon

Storyboard Artist

Kim Eun Joo

Storyboard Artist

Jo Hun

Storyboard Artist

Kim Joong Cheol

Storyboard Artist

Doo-Hyun Choi

Post-Production Manager

Kang Hei Chul

Director

Han Seung Woo

Director

Park So Young

Director

Young-Un Park

Production Manager

Lee Young Jin

Casting

Han Kwang Il

Co-Executive Producer

Hyun Ku Lee

Producer

Lee Seung Wook

Associate Producer

Kohei Obara

Executive Producer

Kim Eun-jung

Sound Re-Recording Mixer

Hyun Joon Kim

Foley

Kim Jae Hyuk

ADR Editor

Han Kyung-Hoon

Music Director

Jeong-eun Song

Sound Effects

Hong Yoon-sung

Sound Re-Recording Mixer

Kim Suk-won

Sound Supervisor

Choi Ji Hyeon

Lead Character Designer

Nari Park

Animation Supervisor

Pak Tae-jun

Comic Book

Isao Murayama

Screenplay