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Season Regulars 15
Yoon Hyun-min
Ko Nan-do / Holo
Ko Sung-hee
Han So-yeon
Choi Yeo-jin
Ko Yoo-jin
Hwang Chan-seong
Baek Chan-sung
Lee Jung-eun
So-yeon's mother
Kang Seung-hyun
Yoo Ram
Son Jong-hak
Nam Gi-Ho
Jung Young-ki
Jo Jin-Seok
Jeong Yeon-joo
Ji Na
Nam Myung-ryeol
Baek Nam-Gyu
Jeong Do-won
Mr. Jeong
Lee You-mi
Ji Hye
Yang Dae-hyeok
Lee Dong Sik
Gong Min-jeung
Jeong Ah
Park Geon-gyu
GIO Labs staff