Shim Kyu-hyuck

~ as ~

Park Hyung Seok (Small) (voice)

Han Shin

~ as ~

Park Hyung Seok (Big) (voice)

Ryu Seung-gone

~ as ~

Lee Jin Seong / Park Jong Gun (voice)

Jeong Jae-heon

~ as ~

Vasco / CEO / Lee Nam Su (voice)

Nam Doh-hyeong

~ as ~

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

Hwang Chang-yung

~ as ~

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

Sa Moon-young

~ as ~

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

Lee Kyung Tae

~ as ~

Park Ji Ho (voice)

Kim Hyeon-uk

~ as ~

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

Lee Gyu-chang

~ as ~

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