[Tested on Windows 7, on clusterfuck of Windows 10 settings might be bundled together so keep it in mind, you might need to restart after all]
So after rebooting multiple times after changing localization-related settings this is what I got:
- System language (language packet your OS is installed with) doesn't matter (thank fucking God)
- Locale doesn't matter (japanese-locale Chads, rise up)
- System "Current localization" doesn't matter
- Default/current keyboard layout doesn't matter
- Format (Numbers/Date/Time/Currency) MUST BE SET TO ENGLISH (I tested it only with English/USA)
After changing this you don't have to reboot.
Suddenly sprites and backgrounds started to load (lmao) and I can interact with cat girl (now that she loaded). Superb programming skills. It's not "region locked" feature, it's way you access game assets, you complete and utter imbecile.
I rebooted my laptop first time in almost two years and I haven't restarted so many times in last 15 years, I fucking hope I spared someone this trouble. I'll now proceed to pleasure myself with this cat.