as young Suk-gyu
as Dong-yoon
as Park Hyeon-soo
as Go Jeong-hyeok
as Ah-jin
as Nabi
as ID Pork
as Session musician
as Chu-won
as Yoon Soo
as Kim Tae-hoon
as Yun-Su
as Geum Gang-san
as Kang Chan-sung
as Kim Do-yoon
as Yeo Ui-ju
as Kang Tae-Joon
as Grand Prince Gwangpyeong
as Shin Heung-bok
as Song Ji-min
as Ha Seung-ri
as Park Jae-in
as Grand Prince Suyang
as Jung Dong Min
as Gwang Bak's school friend
as Shin Woo-hyuk
as Chun-Woo
as Lee Ki-hyun
as Do Eun Chang / Do Shin Woo
as Kang Oh-soo (young)
as Sang Min
as Song Wan Ha
as young Shin Ryu
as Tae-yeol
as Yoo Min-woo
as Man #5 best friend
