Kim Il-woo

as Hong Su-hyeok (5 episodes)

as Bike shop manager

as Robbie (voice)

as Seok Dae-hwang (20 episodes)

as Cha Young-pyo (20 episodes)

as Kwon Ki-Chan (53 episodes)

as Lee Sung-ryong (51 episodes)

as Man-soo (27 episodes)

as Go Jin-Taek (50 episodes)

as Director Song (20 episodes)

as Hyunjoon's Friend

as Yun Jung-Suk (172 episodes)

as Hong Che-ri's Manager

as Jae Seong An (1 episode)