Choi Seung-hoon

as Jo Yong-pil (teenage) (16 episodes)

as Yoon Sa-wol (young) (6 episodes)

as Self - Contestant (12 episodes)

as Na Il-deung (young) (1 episode)

as Baek Min-jae (young) (16 episodes)

as Hwang Jung-tae (12 episodes)

as Manager's (voice)

as Choi Woo-Joon (32 episodes)

as Joon-hyung

as Mok Jin-woo (child) (16 episodes)

as Ahn Min-hyuk (young) (16 episodes)

as Son Ah-ram (2 episodes)

as Kang Jae-hyeok (child)

as Kim Je-ha (young) (16 episodes)

as Kim Jang-soo (child)