Jung Yu-mi

as Yeon-seo

Kim Sae-ron

as Soo-jung

Jung Kyung-ho

as Soo-chul

Choi Deok-moon

as Kim Jong-ho

Jo Dal-hwan

as Pil-gyu

Lee Young-yoo

as Kim Song-yi

Yoon Chan-young

as Soo-chul (Young)

Kim Bin-woo

as Female Victim

Yoon Don-sun

as Policeman

Jun Yoon-ji

as Bakery Part-time Worker

Kim Jae-hwa

as Social Worker

Seo Kyung-hwa

as Yeon-seo's Mother

Go Da Yun

as Soo-chul's Older Sister

Shin Dong-ryeok

as Soo-chul's Father

Seo Hyun-woo

as Male Police Officer

Kim Mi-hui

as Female Police Officer

Ha Ji-eun

as Woman in Haengdang Area

Kim A-ram

as Mummy

Yoon Tae-in

as Man of Couple

Song In-seop

as Cellphone Man

Kang Deok-joong

as Rookie Laborer