Detective Squad Chief
Yoon-young's Father's Junior
Hunter
Colonel
Director Ko
Chairman
Mob Director Park
English Teacher
Man
Detective Choi
High ranking public officer
Factory Owner
Prosecutor Park
Jang
Chief Sun
Middleman
Sponsor Chairman
Director Ho
Mr. Oh
Ho-gu
Kim Woo-Joo's Grandfather
Baek In Soo
Tae Jong-gu
Self
Chung Suk [former king of Goryeo / Wang Yoo's father]
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