Secret Sister
Genre: RealityTotal Seasons: 1Total Episodes: 19Runtime: 50mRelease: 4th May, 2018
Created by: 오정, 박소정Languages: KoreanCountry: South KoreaPlot: Celebrities become an Unnie (older sister) for a day to a younger celebrity spending 24 hours together, sharing one bed and one blanket.
Company: JTBC PLUS