Yang Se-jong

as Ma Gang-uk (12 episodes)

as Oh Hee-dong (11 episodes)

as Self (1 episode)

as Lee Won-jun (9 episodes)

as Self (1 episode)

as Seo Hwi (16 episodes)

as Self (10 episodes)

as Gong Woo-Jin (32 episodes)

as On Jung-Sun (40 episodes)

as Lee Sung-joon / Lee Sung-hoon (16 episodes)

as Lee Gyeom (young) (28 episodes)

as Do In-beom (2 episodes)

as Self (1 episode)

as Self (1 episode)