Great WW1 themed story. I liked the use of the Kaiserite witches as a form of progression marker, and the descriptions/hauntings are great pieces of unnerving trench horror.
Personally, I found some of the segments a little long-winded and could've been broken up a bit more into slightly more digestible pieces. But overall this is a brilliant VN, I think it's just the right length too; with lot's of hints to a larger world.