Cast
Yoon Hyun-min
Ko Nan-do / Holo • 12 episodes
Ko Sung-hee
Han So-yeon • 12 episodes
Choi Yeo-jin
Ko Yoo-jin • 12 episodes
Hwang Chan-seong
Baek Chan-sung • 12 episodes
Lee Jung-eun
So-yeon's mother • 12 episodes
Kang Seung-hyun
Yoo Ram • 12 episodes
Son Jong-hak
Nam Gi-Ho • 12 episodes
Jung Young-ki
Jo Jin-Seok • 12 episodes
Jeong Yeon-joo
Ji Na • 12 episodes
Nam Myung-ryeol
Baek Nam-Gyu • 12 episodes
Jeong Do-won
Mr. Jeong • 12 episodes
Lee You-mi
Ji Hye • 12 episodes
Yang Dae-hyeok
Lee Dong Sik • 12 episodes
Gong Min-jeung
Jeong Ah • 12 episodes
Park Geon-gyu
GIO Labs staff • 12 episodes
Kim Soo-jin
Mère de Nan-Do • 1 episodes
Lee Ki-chan
Lee Ki Chan Yeon Kang Woo [So Yeon's boss] • 4 episodes
Baek Jin-hee
Voice • 1 episodes