히든페이스: Reparto
송승헌
Sung-jin
Cho Yeo-jeong
Su-yeon
박지현
Mi-ju
박지영
Hye-yeon
박성근
Office manager
차미경
Sung-jin's mother
변중희
Ms. Park
박영준
Deputy concertmaster
주예린
Su-yeon's friend
이소영
Su-yeon's friend
Koh Na-young
Su-yeon's friend
손은호
Su-yeon's friend
윤세웅
Plumber
Seo Moon-ho
Detective
심우성
Detective
오누리
Orchestra employee
Lee Moon-bin
Chef
손주환
Driver
신재영
Old woman
Kim Yu-na
Eun-bi
Seo Mun-ho
Detective 1