Park Mi-young
Cho Ji-hye
Jo Ji-chul
Yang Jang-mi
Chief Civil Service Officer
Woo-jun
Philip
Yong-seok
Chan-young
Detective Oh
Youngest Detective
Chae Sook-hee
Motel Staff
Hwang Bok-hyun
Young Ji-hye
Big Man
Police Chief
Se-jin's Mother
Youth Division Detective
Soo-bin
JD the Tatooist
Arabian Subordinate
Club Staff
High School Student
Kang Sang-doo
Back Street Nostalgic Girl
Detective Kwak
Past Citation Moderator
Girl Cop
Cyber Investigations Police
Seo-jin
Carmelo
Truck Driver in Accident
Happy Balloons Boss
Chan-woong
Seo-jin's Doctor
Criminal Affairs Division Civil Petitioner
Helium Balloon High Schooler
New Pacific Suicide Female Victim
Woman & Youth Division Detective
Flirty Man at Club
Shinchon Sunglasses Man
Helium Balloon High Schooler
Former Female Taskforce
Happy Balloon University Student
Guardhouse Conscripted Policeman
Arab Owner of Big-sized Clothes Store