Cho Yu-jin

as Ji-ung's mother (1 episode)

as Cho Byeol Nae [Factory worker] (12 episodes)

as Seom Seom [Eun's aide] (9 episodes)

as [Employee] (1 episode)

as [Doctor] (1 episode)

as Kim Yang

as Teacher Ahn (10 episodes)

as 조유진 (12 episodes)

as [Instructor] (1 episode)

as Practice Room Member Min-ji

as [Reporter] (1 episode)

as Victim 4

as Han Eun-sook

as Karaoke Helper 1

as Japanese Court Clerk

as Jeong's Eldest Daughter