Lee Kang-wook

as Gujin High alumni (1 episode)

as Lee Hynn-min

as Byeon Seung-jun (1 episode)

as Quiet Woman Director (2 episodes)

as Han Sang-cheol (12 episodes)

as Yeo Yun-cheol (12 episodes)

as Jung Yoon-ho (14 episodes)

as Detective (1 episode)

as Japanese officer #2 (1 episode)

as Song Jae Su (1 episode)

as [Drunken driver] (3 episodes)

as Kang Jae-Won (18 episodes)

as Oh Hyung-ju