Kim Dong-wook

Hwang Gyeong-min/Nam Gi-cheol, who lives without forgetting the memories of school violence 20 years ago, now in the guise of a taxi cooperation ceo. Lee Chan-yu as young Hwang Gyeong-min

Joo Young-do Choi Yoon-jae as young Joo Young-do

Lee Jung-hoon, anchorman for Live News who is loved for exposing his guests' wrongdoings.

Jo Jin-gap, a pure-hearted, hardworking, and honest person with strong sense of justice. He was once a promising judo athlete but was forced to quit after trying to protest an unfair result. He then attempted to become a fitness teacher, but it did not last long as he was unable to control his quick temper in front of the chairman's son. He eventually studied and passed the level nine civil servant exam and becomes a civil servant for a secured government position. However, everything changes when he is assigned as a labor inspector for the Ministry of Employment and Labor.

Yoon Hwa-pyung, a shaman who was born with psychic powers. Choi Seung-hoon as young Yoon Hwa-pyung

Seo Hyun

Kim Eun-gi, son of Finance Minister

Lee Cheol-gyu (season 2, ep. 1-2)

Lee Jae-ha, son

Wang Sam-baek (3rd son)

Jin Ha-rim