히든페이스

Song Seung-heon

Sung-jin

Cho Yeo-jeong

Su-yeon

Park Ji-hyun

Mi-ju

Park Ji-young

Hye-yeon

Park Seong-geun

Office manager

Cha Mi-kyeong

Sung-jin's mother

Byun Joong-hee

Ms. Park

Park Young-jun

Deputy concertmaster

Joo Ye-rin

Su-yeon's friend

Lee So-young

Su-yeon's friend

Koh Na-young

Su-yeon's friend

Son Eun-ho

Su-yeon's friend

Yoon Se-woong

Plumber

Seo Moon-ho

Detective

Sim Woo-sung

Detective