Mainly Hoyoverse
Simulator system
You chose the starting game world her "original world" but I'll write this as a Honkai star rail start point (this is an example not a standard)
A woman is isekaied into a HoYo game of your choice a couple of weeks before the story just enough time to get her barring's.
When it comes to the system it's the typical simulation system except that she starts from the very beginning of the game she is simulating take genshin impact for example she starts before phanse gets there then each simulation from then on is a continuation once she gets to the beginning of the story she does character simulation like the typical simulation story's here is the catch for her world changes the worlds merge with each simulation bit by bit so by the official start of each simulated game the worlds are completely merged together this is where the Hoyoverse part of the story will come in.
In her original game world she starts at the Herta space station she is a normal human not an emanator like in most stories the only thing different about her is she can resonate with stellerons not that anyone will notice till Stella comes. Sense this is Star Rails each introduced game is a new world that the Mc has to "discover" while on the train only for everyone on the train to discover lore about the Mc on the world talk about a surprise for the express crew.