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)
Han Kyung-Hoon
Original Music Composer
Hyun Joon Kim
Foley
Kim Eun-jung
Foley
Kim Eun-jung
Sound Effects
Jeong-eun Song
Sound Effects
Hyun Joon Kim
Sound Effects
Kohei Obara
Executive Producer
Han Kwang-il
Co-Executive Producer
Isao Murayama
Screenplay
Dae Woo Lee
Art Direction
Han Kyung-Hoon
Music Director
Hyun Ku Lee
Producer
Lee Seung Wook
Associate Producer
Lee Young Jin
Casting
Kim Jae Hyuk
Dialogue Editor
Kim Jae Hyuk
ADR Editor
Ji Hyeon Choi
Lead Character Designer
Young-Un Park
Production Manager
Nari Park
Animation Supervisor
Doo-Hyun Choi
Post-Production Manager
Kim Suk-won
Sound Supervisor
Hong Yoon-sung
Sound Re-Recording Mixer
Kim Eun-jung
Sound Re-Recording Mixer
Pak Tae-jun
Comic Book
Pak Tae-jun
Original Series Design