Goo Seung-hyun

as Young Kim Su-hong

as Yeon-woo

as Young-nam

as Young Park Hoon

as Young Jeong-jo

as Hwang Chi-woong

as Park Soo-Ha (young)

as Young Choi Kang-ho

as Han Eun-gi

as Kid at Rehab

as Kang Chae-yoon and Dam's eldest son

as Park Chan-noh

as Oh Jung-min

as Young Sang-man

as Hwang Hyun-joon

as Prince Yeongchin

as Hong Chan-doo (young)