Park Jae-joon

as Jung Goo-won (12 episodes)

as Oh Woo-ram (16 episodes)

as Child Noa (1 episode)

as Kang Tae-moo (child) (1 episode)

as Choi Hoon (12 episodes)

as Han-byeol (103 episodes)

as Tak Seon-kyung [Young] (3 episodes)

as Choi Eun-dam (1 episode)