Baek Sung-hyun

as Ko Yeon-mu (1 episode)

as Cheol-soo's uncle

as Choi U-ri (128 episodes)

as Kim Jong-hyun (12 episodes)

as King Mokjong (32 episodes)

as Jang Kyung Joon (123 episodes)

as Kim Yeong Kwang (16 episodes)

as [Lion Hearts FC] (42 episodes)

as Sung-doo

as Do Hak Young [Cable Man] (8 episodes)

as Shim Dae-sik (30 episodes)

as Park Tae-seong

as Hyun-woo (7 episodes)

as Lee Young-gook (20 episodes)

as Kim Byung Chul (12 episodes)

as Goo-rim

as Park Hyun-soo (27) (16 episodes)

as Chun Ji-woon (23 episodes)