@c933103 JNC had done some as part of Rokujouma kickstarter and, iirc, YP included text transcriptions of them with A Sister's All You Need volumes.
From what we've heard about it, it was a great pain in the ass to work with, both production- and legal-wise.
And then there's an added bonus that the target audience for them is much smaller than already very niche LNs, so I wouldn't expect any audiodramas being picked up outside of very special circumstances.
I'm reading it now, it's a nice read. So many interesting series that unfortunately were licensed when light novels weren't as big, so they all died after a volume or two. +1
@LurkingMcLurk Unfortunate, I even tried shilling it to help with sales. I guess the author's creative mind was simply too maverick despite all the rave reviews from online people.
Series is completed with 3 volumes with a soft ax. There's still a lot that could have transpired, but at least it ended on a decent stopping point.
I wouldn't call it a masterpiece, but it is a nice read as long as you don't mind a very infantile female lead. On a positive side, this series is free of a very annoying trope of adult cast acting like... uhh, being very unpleasant in attempt to convince the audience just how grown-up they are.
The real gem here, though, is a side pairing. Watching them was probably even more enjoyable than following the main cast.