Kang Nam-gil

as Cho Man-bok

as Oh Chang-Soo

as Kang Dae-sik

as Lee Gye-Dong

as Jung Kang-Sik

as Brain Security

as Yoo Tak's dad

as Seo Joon-suk

as Han Man-ho

as Song Deok-Gu

as Choi Myung-shik

as Jung In-sung

as Han Sang-hoon

as Kang Woo-cheol

as Na Se-dol

as Kim Gool-Jong

as Hong Kyu-Man

as Oh Ki-dong

as Watanabe

as Son Il-gun

as Kim Tak-gu

as Hong Moon-Gu

as Jo Gi-dong

as Chae-kyeong's Father

as Juno's Father

as Oh Young-jae

as 김태경