| Darsteller | Rolle |
|---|---|
| Mickey Gallo | Cho Gyu-cheol (2) Jang Seong-gu Jang Seong-gu's mother Kim Hyeong-ju Kim Hyeong-ju's mother Kim U-jin Park Dae-seok's father Shin Ji-su Yeon-jun's mother |
| Sung-min Lee | Choi Kang-seok (10) |
| Jong-soo Kim | Hwang Gi-tae (7) Hwang Ki-tae (3) |
| Shin Ha-Young | Choi Ga-yoon (5) Choi Ga-yun (5) |
| Young-kyu Song | Ryu Kwang-pil (9) Ryu Gwang-pil |
| Mu-Yeol Kim | Na Hwa-jin (10) |
| Lee Tae-Hwan | Jang Kwon-hyuk (10) |
| Jin Ki-joo | Im Han-rim (10) |
| Lee Ji-hae | Seo Jun-mo (9) Kang Seo-jun's mother |
| Byeong-chun Kim | Lee Cheol-myeon (3) |
| Adrian Sevan | Jung Seon-yeong (2) |
| Choi Jae-sup | Kang Jun-man (2) |
| Kevyn Aucoin | Bank Manager |
| Chan-hyung Kim | Du-mok |
| Dong-ho Kwon | Kim Seok-hyeon |
| Yong Park | Principal |
| Sung-il Bae | Prison Warden |
| Duk-moon Choi | Cheon Sang-yeol |
| Park Ji Yun | Lee Ji-young |
| Chae-Eun Kim | Oh Yun-jin |
| Jo Hyun-wu | Lee Jae-yun's father |
| Yoon Young-min | Consultant |
| Kim Sun-hoa | Jung Su-jeong's mother |
| Seong No-jin | Principal |
| 윤운영 | Teacher |
| Jeong Jong-yeol | Committee Chairman |
| Kim Da-huin | Yoon Tae-gyeong |