Kim Geon

as Jong-yoon

as Baek Han-sol

as Su-hyeon's brother(1 ep)

as Baek-jin's Classmate(1 ep)

as Eunuch Hong (Child)(20 eps)

as Geon

as Joon-ki(40 eps)

as Busan Arm Wrestling Elementary School Student

as Hotel restaurant kid

as Elementary Student Victim of Cellphone Theft