One Day streaming: where to watch online?
We couldn’t find any streaming options in the United States right now. One Day is available in Japan and South Korea on Amazon Prime Video, U-NEXT, and 3 other services.
One Day (2017)
Original Title: 어느날
6.5 (752)1h 54min
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One Day is not available for streaming in the United States. After checking 1,524 streaming services, we found the title in 2 other countries.
South Korea 
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Synopsis
A man, who witnessed his wife's suicide, gradually cures his emotional scars through a fateful encounter with the spirit of a woman in coma.
Videos: Trailers, Teasers, Featurettes
Cast
Kim Nam-gil
Kang-soo
Chun Woo-hee
Mi-so
Jung Sun-kyung
Mi-so's Mother
Im Hwa-young
Seon-hwa
Park Hee-von
Ho-jung
Yoon Je-moon
Choi Doo-yong
Kim Ye-joon
Choi Ji-ho
Kim Jung-hyun
Assistant Manager Cha
Lee Seung-yeon
Head Nurse (uncredited)
Lee Ru-ahn
Studio Complex Keeper
Kim Hye-ok
Seon-hwa's mother
Kang Sook
Mi-so's caregiver
