cast
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Song Kang-ho
Sang-hyun
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Gang Dong-won
Dong-soo
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Bae Doona
Su-jin
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IU
So-young
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Lee Joo-young
Detective Lee
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Lim Seung-soo
Hae-jin
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Park Ji-yong
Woo-sung
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Kim Sun-young
Orphanage Director's Wife
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Lee Mu-saeng
Seon-ho
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Lee Dong-hwi
Mr. Song
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Kim Sae-byuk
Mr. Song's Wife
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Bek Hyun-jin
Detective Choi
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Oh Hee-jun
Detective Choi's Subordinate
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Ryu Kyung-soo
Tae-ho
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Jong Ho
Young-gil
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Sung Yoo-bin
Young-min
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Park Kang-seop
Si-woo
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Kim Keum-soon
Ms. Park
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Kang Gil-woo
Mr. Im
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Kim Yae-eun
Mr. Im's Wife
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Jung Ji-woo
Mr. Yoon's Wife
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Ryu Ji-an
Yun-ah
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Yun Seul
Babybox Staff 1
- Jang Hye-min Babybox Staff 2
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Jeong Jong-yeol
Babybox Pastor
- Jung Ah-young Jung-ae
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Lee Ye-seo
Ye-seo
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Choi Hee-jin
Mi-sook
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Lee Do-goon
Police Officer
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Kim Do-yeon
Seon-ah
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Choi Hyo-sang
Doctor
- Kang Min-ji Nurse 1
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Lee Ga-kyung
Nurse 2
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Yang Gwon-seok
Taxi Driver
- Yoon Sang-hak Granny in Front of the Laundromat
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Lee Doo-seok
Gyu-seok
- Lee Do-gyoo 4-Year-Old Woo-sung
- Lee Yoo-joo Little Girl at So-young's House 1
- Kang Gyoo-rin Little Girl at So-young's House 2
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Kim Joo-eun
Little Girl at So-young's House 3
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Lim Ga-Young
19-Year-Old Girl at So-young's House
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Woo Sung-min
Orphanage Kid 1
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Choi Yoon-woo
Orphanage Kid 2
- Jung Hyuk Teenager 1
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Lee Dong-hyeon
Teenager 2
- Kim Yoon-ho Teenager 3
- Kim Do-yeop Teenager 4
- Song Ji-ho Teenager 5
- Kim Soo-ji Teenager 6
- Park Jong-hyeon Detective 1
- Jeon Sun-ho Ji-yeong
- Park Yeong-joon Orphanage Staff
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Hwang Do-yoon
Babybox Baby 1
- Kim Da-na Babybox Baby 2
- Kim Soo-hyeon Babybox Baby 3
- Bae Ga-jin Babybox Nanny 1
- Kim Jin-ah Babybox Nanny 2
- Son Yeong-ok Sang-hyun's Mother
- Jeong Myeong-yeon Sang-hyun's Wife
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Sin Chae-rin
Young Yun-ah
- Park Geon-woo Young Dong-soo
- Choi Gi-sang First Director of the Orphanage
- Park Byeong-gwan Second Director of the Orphanage
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Na Gyeong-cheol
News Anchor (voice)
- Lee Ga-eun KTX / Subway Announcement (voice)
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Song Sae-byuk
Orphanage Director
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Park Hae-joon
Mr. Yoon