Demo released today for the next REBF game, only for "follower" rank on ci-en
Meaning, you can download it for free and from the original source directly, if you made an account on ci-en and follow asgar kishidan's profile.
title: REBF gaiden (外伝)
Full game releases either this november or this december, according to the dev in the recently released trailer. (on chobits)
Here's the link to the ci-en article with the demo:
You must be registered to see the links
The TL;DR of his other recent posts is: He finished all the animation, and by next month he'll most likely be done with writing the scenes and the text for each ones. Then, he'll work on the final touches and release the game. The full game should have around 2.5 times more content than REBF in every way including monsters and scenes, going up to 100 different characters. The storyline is not only a sequel to REBF but also a sequel to the other games, there will be a few returning characters as well (at least 3 known). It's set in a new continent with three major cities and you begin as a monk for the church in a theocratic state, one of the three major cities. There should be lots of sand around, desert vibes.
You should be able to port your save from the demo into the full game, according to the dev.