Hello, I had exactly the same problem as you, both on Windows and Mac.
If this can help, I tested to download/install/start it from the itch application and now it works !!! :)
So for Windows you should try it. First download the itch app (https://itch.io/app) from the site, then I choose "explore" then typed the tag "erotic" and go down the list to find this game.
Hope this helps