I've seen kooonsoft's blogpost and it looks like the game will be ready around early 2020's so we aren't going to get any new good demos besides probably teasers, probably the developer will release a new demo for warrior girl but don't expect too much since its only a demo.
Wait a month or so before you can download the full version out there on many sources.
Same goes for a lot of hentai game developers out there, 2020 might be a good year for good stuff to be honest, its been a really bland year for 2019 on some good hentai and not to mention studio fow's new game is still in progress, after that they will be focusing their attention to many of their previous projects that are put on hold.