- Lee Yeong-ae
- Â Koo Kyung-yi / ... 12 episodes, 2021
- Kim Hye-jun
- Â K / ... 12 episodes, 2021
- Kim Hae-sook
- Â Director Yong / ... 12 episodes, 2021
- Kwak Sun-young
- Â Na Je-hee 12 episodes, 2021
- Hong Nae Lee
- Â Geon-wook 12 episodes, 2021
- Baek Sung-Chul
- Â Santa 12 episodes, 2021
- Jeong Jong-joon
- Â Na Jong-jun 12 episodes, 2021
- Jung Suk-yong
- Â Department Head Kim 10 episodes, 2021
- Bae Hae-sun
- Â Jung Jeong-yeon 7 episodes, 2021
- Park Ji-bin
- Â Heo Hyeon-tae 7 episodes, 2021
- Choi Dae-chul
- Â Heo Seong-tae 7 episodes, 2021
- Park Ye-young
- Â Yoon Jae-yeong 3 episodes, 2021
- Cho Hyun-chul
- Â Oh Gyeong Su 2 episodes, 2021
- Kim Ki-chun
- Â Caretaker 2 episodes, 2021
- Song Hoon
- Â 'MEK Security' employee 2 episodes, 2021
- Kim Kang-hyeon
- Â Kim Min Gyu 1 episode, 2021
- Eom Ji-man
- Â Prosecutors' office staff 1 episode, 2021
- Kim Ha-eon
- Â Boy 1 episode, 2021
- Shin Yun-Seob
- Â Park Kyu Il 1 episode, 2021
