Kang Ha-neul
Role: Kim Yo-han
Lee You-young
Role: Oh Soo-yeon
Heo Sung-tae
Role: Yoon Byung-wook
Kim Sang-ho
Role: Mok Jin-hyung
Kang Young-suk
Role: Jang Seon-oh
Park Seong-geun
Role: Hong Sang-wook
Kang Shin-hyo
Role: Hong Jae-seon
Jeong Man-sik
Role: Yang Hwa
Kim Si-eun
Role: Park Ro-sa
Sung Ji-ru
Role: Heo Sang-soo
Cha Yeob
Role: Kim Gil-sang
Yoon Byung-hee
Role: Kim Woo-sang
Lee Dong-won
Role: [Seongju Prison inmate #1321]
Moon Sung-keun
Role: Do Won Bong [Seongju Prison inmate]
Heo Dong-won
Role: Yang Jun ['Skin Nation' chairman]
Choi Dae-hoon
Role: No Seung Hwan / Nam Dae Moon [Seongju Prison inmate]
Han Jae-yeong
Role: Jo Hae Do [Bukyeongpa gang]
Oh Tae-kyung
Role: Woo Sang Ki [Goldman Casino's accountant / Min Ho's father]
Choi Moo-seong
Role: Song Doo Cheol [Bukyeongpa gang]
Han Kyu-won
Role: Eom Ik Soo [Bukyeongpa gang]
Jo Hee-bong
Role: Ryu Tae Hoon [Seongju Prison inmate]
Lee Ha-yul
Role: Kim Woo Jae [Prosecutor]
Kim Min-seung
Role: Woo Min Ho [Sang Ki's son]
Yoo Ha-bok
Role: Kim Jung Gyu [Prosecutor]
Kim Byung-cheol
Role: [Sinseondong elder]
Seo Myung-chan
Role: [Sinseondong elder]
Lee Yang-hee
Role: [Sinseondong elder]
Moon Jong-won
Role: Kim Sung Bum [Seongju Prison staff]
Park Joong-geun
Role: Park [Seongju Prison guard]
Kim Kyu-baek
Role: [Seongju Prison inmate #1369]
Hwang Dae-woong
Role: [Seongju Prison inmate #8934]