character - Baek Jang -ho

character - Bang Ki-ho

character - Cha Gi-baek

character - Choi Han-gyu

character - Hwang Dong-woo

character - Oh Yeong-geun

character - Jung-su

character - Park Jin-suk

character - Kim In-su

character - President Han

character - Teacher Baek

character - Chae Byung-Hak

character - Noh Joon-suk

character - Kim Je-seok

character - Lee Young-Joon

character - Lee Sun-Moon

character - Jang Tae-joon

character - Cha Jae-hwan

character - Byun Dae-sung

character - Han Pan-seok

character - Kim Geon-pyo

character - Chairman Kim Nam-yoon

character - Seo Dae-Seok

character - Kim Yongchun

character - Kim Seok-joon

character - Chae Dae-pil

character - Lee Hoe-young

character - Oh Tae-suk

character - Jang Kil-Taek

character - Park Jae-hyun

character - Kang Sang-maan

character - Chang-sik

character - Kang Dong-hyun

character - Park Jin-kwon

character - Yoon Myung-hoon

character - Yoon Soo-ha (2006)

character - Ji Kyung-hwan

character - Department Head Nam

character - Kim Soo-bong

character - Kim Jae-man

character - Manager Jin

character - Professor Kim Jinwoo

character - Professor Yoon

character - Jong-goo

character - Kim Seok Ju