2018 · Reality · 9.0/10 (1 votes) · 1 season · 19 episodes · Ended
Celebrities become an Unnie (older sister) for a day to a younger celebrity spending 24 hours together, sharing one bed and one blanket.
Directed by 박소정
Written by 오정
Genre: Reality
Language: Korean
Country: South Korea
Network: JTBC PLUS
Original title: 비밀언니
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Secret Sister is a 2018 reality series rated 9.0 out of 10 by 1 viewers on TMDB. The series follows: Celebrities become an Unnie (older sister) for a day to a younger celebrity spending 24 hours together, sharing one bed and one blanket.
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