아파트

고소영

Oh Se-jin

강성진

Detective Yang Na-sun

Jang Hee-jin

Yu-yeon

박하선

Jung-hong

김하은

Woman who committed suicide

Kim Dong-wook

Shin Jung-soo

笛木優子

Subway

김규민

Detective

Lee Young-hee

Elder

Ban Hye-ra

Hye-ra

강인형

Student

Oh Jeong-won

Jung-hong's mother