It looks like this is only the demo for ch2 - the full chapter is still being worked on and have not been released yet.
I managed to get the demo of ch2, but it seems to have a dark filter over most of the CGs as a censor that virtually makes the game unplayable. I think the dev released an uncensor patch but is now no longer available unless you become a sponsor and ask for it yourself.
I'll share the link here just in case there's someone that knows a way to get rid of that annoying black filter, so that everyone can finally play the demo version.
HOWEVER, the good news for anyone that has never played the game and didn't know that a chapter 1 even existed - I personally have the first game - There are no censors, and the chapter is complete. I also have a complete CG rip in a separate folder link if there's any that's interested in getting it too.