Searching for English translation

[triangularprism.livejournal.com]

I've just recently bought a doujinshi that I'm not familiar with. It's Spain-centric (though with some Romano and France) and is called 'Reienda negura' (or 'Reiesoda negura') according to the katakana. The artist is OSOVA.

Here's the cover.

If anyone knows this, is there a scanlation of it somewhere? My Japanese isn't good enough to understand all of it, and I want to know the story.