Lurking Facade

Nara quit her past job and decided to be a freelancer after an incident that put her into humiliation, due to this she frequently have the same nightmare and it stressed her out until one night she had the same nightmare and it woken her up and her phone mysteriously play an ad about an app, It sparked her interest but she was hesitant to join until she woken up again from her sleep by a notification that the app was installed, Curiosity made her open the app, What could possibly go wrong?