Apt

Ko So-young

Oh Se-jin

Acting

Kang Seong-jin

Detective Yang Na-sun

Acting

Jang Hee-jin

Yu-yeon

Acting

Park Ha-seon

Jung-hong

Acting

Kim Ha-eun

Woman who committed suicide

Acting

Kim Dong-wook

Shin Jung-soo

Acting

Yuko Fueki

Subway

Acting

Kim Kyu-min

Detective

Acting

Lee Young-hee

Elder

Acting

Ban Hye-ra

Hye-ra

Acting

Kang In-hyung

Student

Acting

Oh Jeong-won

Jung-hong's mother

Acting