심규혁

Park Hyung Seok (Small) (voice)

Han Shin

Park Hyung Seok (Big) (voice)

류승곤

Lee Jin Seong / Park Jong Gun (voice)

정재헌

Vasco / CEO / Lee Nam Su (voice)

남도형

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

황창영

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

사문영

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)

이규창

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)