Yoo Seung-ho
Han Jung-hoon
Kang So-ra
Lee Da-jeong
J
Jo Sang-geun
Kim Tae-gyoo
J
Jeon Jun-hong
Byeong-soo
Jeong Seok-yong
Kang Gook-man
Park Cheol-min
Crazy
Rie Young-zin
Yun Sang-mi
K
Kim Dong-beom
Do-il
Jo Yoon-hee
Hong Ju-hee
L
Lee Chan-ho
Tak Teuin
Min Kyung-jin
Headmaster
Im Soo-hyang
Fan
Kim Young-woong
History teacher
Jung Young-ki
Student in Grade 2 Class 5
Oh Jin-ha
Student in Grade 2 Class 5
Choi Hong-rak
Student in Grade 2 Class 5
Kim Min-su
Virtual Criminal