as Park Hyung Seok (Small) (voice)

as Park Hyung Seok (Big) (voice)

as Lee Jin Seong / Park Jong Gun (voice)

as Vasco / CEO / Lee Nam Su (voice)

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

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

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

as Park Ji Ho (voice)

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

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

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

as Hyung Seok's Mom (voice)

Original Music Composer

Foley

Sound Effects

Sound Effects

Foley

Sound Effects

Co-Executive Producer

Executive Producer

Music Director

Art Direction

Screenplay

Producer

Dialogue Editor

Casting

Associate Producer

ADR Editor

Sound Re-Recording Mixer

Sound Re-Recording Mixer

Sound Supervisor

Production Manager

Lead Character Designer

Post-Production Manager

Animation Supervisor

Comic Book

Original Series Design