I forget how, and this won't be very helpful, but it is not a day counter. Try looking at the logbook in your items, or search it up online.
The wiki website that might be of official use for this game is called miraheze.
Or i might just be stupid and it is in the safehouse upstairs.
Does the official wiki have a web page? I can't search.
Again, it might not be official, but here.
https://lustdollplus.miraheze.org/wiki/Main_Page
But he is really great and comprehensive.
Yes