Well, we don't have to dedicate a lot of space to this, since it seems a bit crap. But I would like to find out why there are two versions for PC88, and whether this was just a Comiket title, or a full blown release. We can run your article on a single page: first this game, acting also an intro of sorts, followed by the bigger and better PC98 sequel.
I'm assuming there are just these three games in the series?
In case you wanted it, here are is the message text from the guy in the cave. If you load the PLUS version, you find a skeleton instead! This talks about people having answered a questionnaire I think? From what I can tell you're supposed to have some kind of supplementary disk? Whatever it is, it doesn't happen in the PLUS release.
If you check the root directory, you'll also find other screens I took, minus two nudie ones. I want to check with the chief before leaving those on there.