Thanks to Trit' for pointing out that the raw was upscaled. Sorry NickyMacker and Goggled Anon, haven't had time to keep up with uploads to publish and looks like you were already done.
Replacing http://e-hentai.fbk.tokyo/index/g/889939/847cca4256/
because: upscaled (from PDF) at twice the resolution of the actual files. This is likely because this work comes both with a PDF and ready-to-use JPEG files. Stony apparently used the PDF.