Weird that this has been on e-hentai since 2016 and not been translated. So there it is. Also, on the Pixiv site https://www.pixiv.net/artworks/53283528 is an introductory text providing context to this story, which I translated as the first text-only picture. If you find errors or mistakes, please let me know.
EDIT: I'm stupid and obviously don't know how to look for galleries properly. Since the original translation didn't have the context provided on the Pixiv site, I'll still keep the gallery up. If it should be removed, please feel free to purge it.