Content breakdown
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Use caution
**20th Century Girl** is a teen romance set in 1999 where a girl spies on a classmate for her friend and develops feelings herself. While there's no violence or profanity, the film contains moderate sexual content including kissing and implied intimacy. Best suited for older teens comfortable with romantic themes.
Synopsis
In 1999, a teen girl keeps close tabs on a boy in school on behalf of her deeply smitten best friend – then she gets swept up in a love story of her own.
Cast

Byeon Woo-seok
Poong Woon-ho

Park Jung-woo
Baek Hyun-jin
Age suitability
Ages 9–12
Not recommended
Where to watch
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Ratings based on MPAA/TV classification and TMDB metadata. Updated March 2026.
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