- ??? - Hwan-Ki's father
- Kim Ye-ryeong - Hwan-Ki's mother
- ??? - Ro-Woon's father
- Han Eun-seong - Jang Se-Jong
- Kim Mi-kyeong - Ro-Woon's mother
- Jung Yi-yun - Deputy Jung
- Hwang So-hee - Deputy Lee
- ??? - Chae Ji-hye
- Jang Hee-jin - Seo Yeon-jung
- ??? - Himself
- ??? - Advertiser
- ??? - Brain Security
- Jeong Dong-gyoo - Investor in Brain
- Jo Hyun-sik - Man at the men's restroom
- ??? - Man at the men's restroom
- Choi Hyuk - Man at the men's restroom
- ??? - Young Gyu's transgender daughter
- Park Young-kyu - Hwang Yeong-Kyu
- Choi Dae-chul - Restaurant management
- ??? - Master Jin
- ??? - Orphanage director
- Song Hyun-wook
Yeon Woo-jin hace el papel de Eun Hwan-Ki.
?? hace el papel de Kang Woo-Il.
??? interpreta a Eun Yi-Soo en la serie.
??? interpreta a Dang Yoo-Hee en la serie.
??? interpreta a Eom Sun-Bong en la serie.
??? interpreta a Reporter Woo en la serie.
??? interpreta a Kim Gyo-Ri en la serie.
Stephanie Lee interpreta a Director Park en la serie.
??? hace el papel de Hwan-Ki's father.
Kim Ye-ryeong interpreta a Hwan-Ki's mother en la serie.
Capítulo disponible en las siguientes plataformas:
