Moon You-kang

as Um Jong-do (12 episodes)

as Bu Oh-seong (3 episodes)

as Chang-bae

as Lee Mu-gyeol (16 episodes)

as Chae Seung-beom (2 episodes)

as Dad

as Shim Heon (16 episodes)

as Yoo Sung Pil

as Kim Nam Gook (12 episodes)

as [Violent guy at hook-up bar] (1 episode)