Lee Hak-ju

as Han Sang-gu

as Ma Gong-bok (12 episodes)

as Min Jun-young (5 episodes)

as Do-young

as Shin Ga-won

as Lee Jin-woo (12 episodes)

as Park Gi-se (12 episodes)

as Alex / Seong Tae-sik (8 episodes)

as Ji Myeong-seob (12 episodes)

as Yu Tae-gwang (2 episodes)

as Jung-soo (1 episode)

as Nam Yeon-jun (21 episodes)

as Son Gyeong-chan (16 episodes)

as Self (1 episode)

as Lee Ji-goo

as Park Hyun-woo (2 episodes)

as Han Dong-min (20 episodes)

as Min-seok

as Kim Soo-jin (12 episodes)

as Jung Tae-ju (8 episodes)

as Manager Jung