Seo Jung-min (16 episodes)
Kim Gun Woo (16 episodes)
[Radio Show host] (4 episodes)
Gi-won
Shin Jong-Shik (2 episodes)
Choi Jung Hoon / "Alex" [Barro, Service Care Team] (16 episodes)
Lee Dong Geun (16 episodes)
Nam Dong Goo (32 episodes)
Jin Soo (16 episodes)
Won Ju Seok (16 episodes)
Go Myung Suk (16 episodes)
Min Kook (1 episode)
Kang Jun Ho (41 episodes)
Park Sun-chang (32 episodes)
[I Na's stalker] (12 episodes)
Chun Min Gyu (16 episodes)
Lee Woo Sung [Hae Sung's brother, firefighter] (20 episodes)
Jae-yeon
Seo Yo Han (20 episodes)
Jae-chil
Beom Suk (54 episodes)