Jang Eung-Soo (12 episodes)

Kang Min-Jun (Eps 7,8) (2 episodes)

Hee-bum

Park Gyeong Hyeon [Ju Hyeong's client] (1 episode)

Lee Kwang-hee (12 episodes)

Senior (8 episodes)

Kim Jo-dan (12 episodes)

Speed

Jangsan tiger (1 episode)

James

Victor (4 episodes)

Alex (1 episode)

Dong Woo (6 episodes)

Yang Yong-chul (2 episodes)

Jong-guk

Yoo Gi Hyeon (2 episodes)

Choi Yun-jae (5 episodes)

Oh Dong-geun (24 episodes)

Young-cheol

Yeon Geun (32 episodes)

Kim Sun-Woo (32 episodes)

Jeon Young-Sik (16 episodes)

Mountain God Park (16 episodes)

Byeong-soo

Ssanip (32 episodes)

Lee Jung-Ho (1 episode)

Moo Bin's colleague (2 episodes)

Seo Won (1 episode)

Police