Hmm, I bought the game, but I can only download the public version from Itch. Unfortunately, I can't use the game via Steam because my country is too uptight about adult content xD
Well, if you really wanna get it, then I suggest using Opera browser (signed in or signed out/ logged in/ or logged out) with its build-in VPN system. Or maybe using a different VPN to maeask your IP and download the game.
It could be a tad risky depending on your country... For example if your in Korea (no matter south or north 💀) then using VPNs and IP masking or "Location Tethering" services kinda get into the "grey zone" of crime but otherwise it's fine in almost all the countries.
Btw, sorry for my broken English, it's not my native language, I am still trying to learn it after my Spanish, French and Dutch... 😅
Hope this helps you.