Jung Hae-in
An Jun-ho (12 eps)
Koo Kyo-hwan
Han Ho-yeol (12 eps)
Kim Sung-kyun
Park Beom-gu (12 eps)
Son Suk-ku
Lim Ji-seop (12 eps)
Park Se-jun
Heo Gi-yeong (10 eps)
Cho Hyun-chul
Cho Suk-bong (9 eps)
Kim Beom-soo
Kim Il-seok (8 eps)
Jeong Seok-yong
Oh Min-u (6 eps)
Kim Ji-hyun
Seo Eun (6 eps)
Ji Jin-hee
Gu Ja-woon (6 eps)
Shin Seung-ho
Hwang Jang-soo (6 eps)
Moon Sang-hoon
Kim Ru-ri (6 eps)
Lee Sul
Shin Hye-yeon (5 eps)
Park Mi-hyun
Jun-ho's mother (5 eps)
Hyun Bong-sik
Chun Yong-duk (5 eps)
Joo Jong-hyuk
Lee Hyo-sang (5 eps)
Lee Gyu-hoe
Yang Du-gwan (5 eps)
Go Kyung-pyo
Park Sung-woo (4 eps)
Kwon Hae-hyo
Jun-ho's father (4 eps)
Hong Kyung
Ryu I-gang (4 eps)
Yoo Su-bin
Park Se-ung (4 eps)
Kwon Da-ham
Jeong Hyeong-beom (4 eps)
Hwang Jeong-min
Ru-ri's mother (3 eps)
Yang Mal-bok
Hyeong-beom's mother (3 eps)
Na Hynu-woo
Jeon Seon-ho (3 eps)
Park Jung-woo
Shin Woo-suk (2 eps)
Won Ji-an
Mun Yeong-ok (2 eps)
Lee Yeon
An Su-jin (2 eps)
Kim Dong-young
Choi Jun-mok (2 eps)
Oh Min-ae
Jun-mok's mother (2 eps)
Bae Yoo-ram
Kim Gyu (2 eps)
Han Woo-yeol
Tae Seong-gon (2 eps)
Park Geun-hye
Self (archival footage) (1 eps)
Lee Jun-young
Jeong Hyeon-min (1 eps)
Choi Jun-young
Heo Chi-do (1 eps)
Na Chul
Detective Na (1 eps)
Lee Jung-ok
Sauna manager (1 eps)
Lee Sang-hun
Hyeon-min's father (1 eps)
Bae Je-gi
Detective Bae (1 eps)
Choi Jong-won
Old Man (1 eps)
Oh Ji-hye
Ji Yu-na (1 eps)
Park Yoon-hee
Seo Chang-dae (1 eps)
Bae Na-ra
Jang Sung-min (1 eps)
Yoon Dae-yeul
Broker (1 eps)
Song Jae-ryong
Heo Tae-san (1 eps)
Im Sung-jae
Na Jung-seok (1 eps)
Choi Hyun-wook
Shin A-hwi (1 eps)
Lee Ja-ryeong
Middle-aged Woman (1 eps)
Lee Woo-jung
Nursing officer (1 eps)
Im Su-hyung
Detective (1 eps)
Hong Seok-bin
Factory Director (1 eps)
Yeom Ji-young
Check-in Counter Staff (1 eps)