Park Shin-hye as Seo-yeon

Jun Jong-seo as Young-sook

Kim Sung-ryung as Eun-ae

Lee El as Ja-ok

Park Ho-san as Mr. Kim

Oh Jung-se as Seong-ho

Lee Dong-hwi as Baek Min-hyun

Um Chae-young as Young Seo-yeon

Jo Kyung-sook as Sun-hee

Kim Min-ha as Young Sun-hee

Moon Chang-gil as Junk Dealer

Ryu Kyung-soo as Junior Police

Song Yo-sep as Senior Police

Lee Joo-young as Woman Who Picked Up a Phone (voice)

Park Hyeong-su as Man Who Picked Up a Phone (voice)