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Ga-eun and Su-ho grew up like brothers and sisters. However, Su-ho never showed that he likes Ga-eun ever since they were young. One day, Suho accidentally found Ga-eun's diary and found out that she also likes him. Su-ho reveals his feelings to Ga-eun. Ga-eun is not his real sibling, but to protect their parents, she rejects him...

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Sister's Diary (2020) streaming availability varies by region. Check Netflix, Prime Video, Disney+, and other major platforms. It may also be available for digital rental or purchase on Amazon, Apple TV, or Vudu.
Ga-eun and Su-ho grew up like brothers and sisters. However, Su-ho never showed that he likes Ga-eun ever since they were young. One day, Suho accidentally found Ga-eun's diary and found out that she also likes him. Su-ho reveals his feelings to Ga-eun. Ga-eun is not his real...
Sister's Diary (2020) was directed by Kim Tae-soo. The film is a Romance production with a runtime of 1h 17m, rated 9.0/10.
Sister's Diary runs 1h 17m (77 minutes total). Audience rating: 9.0/10 from 2 votes. Genre: Romance.
Sister's Diary is rated 9.0/10 by 2 viewers — exceptional and highly recommended. A good pick for Romance fans.