I Love Franken [English], an hentai doujinshi parodying the Fate / Grand Order game, by Hyocorou
I used to be annoyed the Fate series took male characters with dramatic historical backgrounds and turned them into fuckdolls for cash, but, eh, weariness has settled in, I just don’t care anymore at this point. So, here, the heroine is Franken, doctor Frankenstein’s creature, a thin girl with (?!?) a unicorn horn, why not!
The point is, in an amusing comedy-based reflection of real life FGO players desperate for more gacha, the master and Frankenstein have nothing better to do than cuddle and have sex ┐( ̄ヮ ̄)┌
In pure hentai terms, the art wasn’t very intense, with a relatively low number of pages showing actual crude activity. But it is more than made up by the mangaka’s unique drawing skills, each page was worth the discovery, in my eyes, seriously check it out, it’s good
Thanks to Constantly for this one!
For MORE, cf. The list of Hyocorou’s shares on HentaiRules!
And now, the download & gallery links 
Open the Complete Pictures Gallery
Download the Free Hentai Manga in a Zip file
(32 MB, 26 pictures, English)
Or you can also use the Alternative:
Zip Mirror #1 – or – Zip Mirror #2
Yeah, I don’t follow this game beyond what I’ve picked up from Carnival Phantasm and doujins. But I have a feeling she has the unicorn horn because she’s a saber. Or she’s a saber because she has a horn, I don’t know. But I also thought you couldn’t knock up a servant.