Kim Jae-uck

as Jeon Jae-yeol (12 episodes)

as Grand Prince Hanpyeong (11 episodes)

as Ko Joon (10 episodes)

as Self (1 episode)

as Jung Gyu-chul (2 episodes)

as Noh Go-jin (16 episodes)

as Self (2 episodes)

as [Special appearance] (1 episode)

as Ryan Gold / Heo Yoon-jae (16 episodes)

as Choi Yoon / Matthew (16 episodes)

as Chan-hae

as Park Jung-Woo (40 episodes)

as Su-wan

as Mo Tae-gu (30 episodes)

as Takeyuki So

as In-Sung

as Seok Min (2 episodes)

as Jae-wook

as Kang Myung-chan

as Self (2 episodes)