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