Been a while since I last posted here. I was quite surprised to find this particular gem. It's one the few Prisma Illya doujin that does not feature porn or tentacles of any kind. There's also a bit of a Fate/Zero 4-koma at the end. Enjoy, Beast's Lair.
WARNING! Site is NSFW and may contain viruses.
http://g.e-hentai.org/g/642217/e6e1923fd9/