Kim Seung-hoon

as Seo Gyeong-seok

as Ho Jun / Manager [Santa's Visit]

as Doctor

as Professor Lim

as Choi Man-ri

as Lawyer Park

as Hwang Jeok-jun (uncredited)

as Mr. Park

as Public Hearing Moderator

as Team Leader Android

as Yoo Min-Chul

as Lee Jae-Hak

as Kim (publishing company head of dept.)

as Ho Jun / Manager [Santa's Visit]

as Noh Hang-gyu

as Wang Sang-Moo