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Region
Amazon Prime Video
Stream included
HD
Included
Fawesome
Watch free
HD
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Amazon Prime Video with Ads
Stream included
HD
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AsianCrush
Stream with ads
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Cineverse Amazon Channel
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Prices last updated September 7, 2026. Pricing and availability may vary by region.
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About
A former Asian Games record breaker and Olympic tryout, Kim Gwang-su, endures beatings, abuse, and constant ridicule from his swimming coach. To justify this abusive behavior, his coach constantly reminded Gwang-su - this is for your own good.
Director
Producers
Yeo Jun-young, Jung Ji-woo, Lee Sang-hyun
Music
Studio
Prain Global, CGV Arthouse, National Human Rights Commission of Korea, Jung Ji-woo Film, Finecut
Original Title
4등
Original Language
Korean
Keywords
Cast
Full credits →Y
Yoo Jae-sang
Joon-ho
P
Park Hae-joon
Gwang-soo
L
Lee Hang-na
Jung-ae
C
Choi Mu-sung
Young-hoon
J
Jung Ga-ram
Young Gwang-soo
Y
Yoo Jae-myung
Coach Park
K
Kwak Min-seok
Director Kim
K
Kim Do-young
Restaurant Manager
K
Kang Ae-sim
Harvard Mother
O
Oh Dae-hwan
Wrestling Coach
K
Kim Min-sik
Detective
N
Nam Moon-chul
Director
C
Cha Bo-sung
1998 Player
L
Lee Jung-eun
Owner of Tented Restaurant
