Secret Sister (2018)
| First Air Date: | 2018, May 4 |
| Last Air Date: | 2018, September 7 |
| Status: | Ended |
| Seasons: | 1 |
| Episodes: | 19 |
| Episode Runtime: | 50 min |
| Created by: | 林嘉誠 |
| Countries: | South Korea |
| Production: | JTBC PLUS |
Overview:
Celebrities become an Unnie (older sister) for a day to a younger celebrity spending 24 hours together, sharing one bed and one blanket.