Series Cast

1. 

   Shim Kyu-hyuck

   Park Hyung Seok (Small) (voice)

2. 

   Han Shin

   Park Hyung Seok (Big) (voice)

3. 

   Ryu Seung-gone

   Lee Jin Seong / Park Jong Gun (voice)

4. 

   Jeong Jae-heon

   Vasco / CEO / Lee Nam Su (voice)

5. 

   Nam Doh-hyeong

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

6. 

   Hwang Chang-yung

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

7. 

   Sa Moon-young

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

8. 

   Lee Kyung Tae

   Park Ji Ho (voice)

9. 

   Kim Hyeon-uk

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

10. 

    Lee Gyu-chang

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

11. 

    Bae Jeong-mi

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

12. 

    Kim Ok-kyung

    Hyung Seok's Mom (voice)