Nam Hyeon-woo

as Park Young-woo (12 episodes)

as Teacher (1 episode)

as Kwon Hui-dong (12 episodes)

as Jo Choong-beom (3 episodes)

as Oh Ji-seob (10 episodes)

as Jo Jae-chan (16 episodes)

as Self (1 episode)

as Self - Various Characters (20 episodes)

as Student

as Jo Choong-beom (50 episodes)