So I encountered a bug where after the Made In Unity splashscreen is done the game is stuck on a gray screen and doesn't do anything. What fixed it for me was getting rid of the saves in the save folder:
C:\Users\YOURPCUSERNAME\AppData\LocalLow\Nth Circle\Model Employee\NaninovelData\Saves
In my case I just moved all the saves to another folder. Afterwards, I started the game to make sure it works. After that, I closed the game and then copied my most recent save back into the folder. I also renamed the save from "GameSave069.json" (no, this is not a joke) to "GameSave001.json". Finally, I booted up the game, and it seems to run fine.
I should also mention that I think the version I am running is before patch 1.03, so I'm not sure if this method would work for it. With that being said, the bug I was encountering still occurred with both versions, so yeah. Maybe I made too many saves?