Lee Jung-jun

as Gyeong-won (57 episodes)

as Seo Doo-sung (12 episodes)

as Jung I-den (16 episodes)

as Cadet 1

as Kang Seung Mo (1 episode)

as Young Lee Young-chun (1 episode)

as □ Mask (1 episode)

as Seong-woo (10 episodes)

as Choi Seung Hyun (2 episodes)

as Choi Seung Hyun (32 episodes)

as Kim Hyung-gyu (16 episodes)