Chief Producer
Cinematography
Director
Screenwriter
Main Role
- Lee Bum Soo Main Role
- Jung Gyu Woon Main Role
- Jung Ryeo Won Main Role
- Hong Soo Hyun Main Role
Support Role
- Kim Eung SooO Ji Rak [Chairman of Jang Cho Pharmaceutical]Support Role
- Lee Ki YoungPark Beom Jeung [Chunha executive director]Support Role
- Yoo Hyung KwanSo Ha [Chunha management director]Support Role
- Yoon Yong HyunYun Bun Gwae [Chunha team manager]Support Role
- Yang Hyung WookHan Sin [Hang U's handyman]Support Role
- Joo Hui JungJang Chil Bok [Ga Bi's assistant]Support Role
- Kim Il WooJang Ryang [Chunha executive director]Support Role
- Kim Seo HyungMo Ga Bi [Chunha head secretary]Support Role
- Jang Hyun SungChoi Hang Ryang [Chunha finance director]Support Role
- Lee Deok HwaJin Si Hwang [Chairman of Chunha Group / Yeo Chi's grandfather]Support Role
- Park Sang MyeonJin Ho Hae [Chunha vice president / Yeo Chi's uncle]Support Role
- Song Kyung ChulPaeng Wol [Mob businessman]Support Role
- Seong Chan HoExecutive Director KimSupport Role
- Lee Seung WonChief KimSupport Role
- Jung Se HyungDeputy KimSupport Role
- Song Min HyungPark Seong Cheol [Bank president]Support Role
- Hong Seung Beom[Team leader]Support Role
- Lee Hee Do[Chunha's head of factory]Support Role
- Lee Keun HeeKim Dae Cheol [Research director]Support Role
Guest Role
- Lee Joon[Idol / Yeo Chi's boyfriend] (Ep. 1)Guest Role
- Im Hyun Shik[Yu Bang's father] (Ep. 1)Guest Role
- Oh Jung Tae[Guinea pig] (Ep. 1)Guest Role
- Choi Gyo Shik[Guinea pig] (Ep. 1)Guest Role
- Bae Gi Beom[Guinea pig] (Ep. 1)Guest Role
- Lee Ju Sil[Yu Bang's mother] (Ep. 1-2)Guest Role
- Kim Kyung Ryong[Head chef] (Ep. 2-3)Guest Role
- Kim Ji YoungJi Won [Han Sin's daughter] (Ep. 5)Guest Role
- Jung Hyun Seok[Chunha's management section staff] (Ep. 5)Guest Role
- Jeong Bo SeokCho Pil Yun [Congressman] (Ep. 6)Guest Role
- Oh Kyung SooDepartment Head Bang (Ep. 6-8)Guest Role
- Lee Joon Hee[Reporter] (Ep. 8)Guest Role
- Joo Boo Jin[Chunha factory worker's mother] (Ep. 10)Guest Role
- Kim Ik TaeDoctor Choi (Ep. 11, 15-17, 22)Guest Role
- Kang Kyung JoonBok Sa Yul [Taeyang Group Director / Hang Woo's friend] (Ep. 12-15, 17)Guest Role
- Lee Jong GooPark Seol Pal [Hospital Director] (Ep. 14)Guest Role
- Son Jong Hak[Lawyer] (Ep. 15-16)Guest Role
- Jung Dong Gyu[Psychiatrist in the ending's prologue] (Ep. 16)Guest Role
- Lee Yoon Sang[Chunha executive] (Ep. 16)Guest Role
- Yoon Bok Sung[Chunha executive] (Ep. 20)Guest Role
- Kim Gwang In[Chunha executive] (Ep. 20)Guest Role
- Kim Sung OhPark Mun Su [Prosecutor] (Ep. 20-22)Guest Role
- Kim Seung Pil[False religion believer]Guest Role
- Jeon Jae Hyung[Delivery man]Guest Role
Unknown
- Lee Ja Min Unknown
- Park Jong Seol Unknown
- Yang Seung Geol Unknown
- Park Geon Rak Unknown
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