I'm encountering the same issue as the previous translator, as you can see in this post. I tried using GARbro, KiriKiriTools, and KrKrExtractor, but even if I can extract the files, they won't work after repacking because they are encrypted. It seems the previous translator received some help and was able to get it working (see the linked post), but in the original thread, the image he posted is no longer available.
Does anyone know how he did it? I would appreciate some help here, even if it's just to decrypt the files. I can continue the rest by myself.
Rui wa Tomo o Yobu is one of my favorite visual novels, and I really want more people to be able to read it, but it looks like this translation project will be closed before it even begins.