This is the peak performance harem. Infinite lust for dick plus first-class yuri action, an all you can eat sex buffet. One day, world. Through VR or catgirls, it will belong to us. Mark my words!
A great way to start the year, indeed! Can't wait for the few remaining Kuroyuki Love Live works to go the same route, hopefully :3 Meanwhile, though, thanks a lot for this!
Thanks for the upload, but you've done the mistake that everybody does while starting of not using the correct raw. Your release is 1280x1800, the 1280 pixel width is a telltale sign that those images have been created by this site for gallery display*; they aren't so smaller as to be a huge problem in this particular case, but the fact that E-H gallery images are saved at 80% quality – thus with noticeable compression artifacts – is. That's the reason why those images shouldn't ever be used for derivative works, because you're starting with a noticeable drop in quality right off the bat.
Moreover, when using lossy formats like JPG every round of saving stacks another layer of compression noise on top . Case in point, the original scan was saved at 87% quality, the gallery version was resaved at 80%, and finally your upload was at 90%. That makes a final quality of 0.87 * 0.8 * 0.9 = 63% of the full quality, or 72% of the original scan.
Ways to get the originals: 0) Avoid aggregators. Yes that also includes NH-dot-net. Even if it has so much mindshare these days that people cite doujins by their 6-digit gallery number there, NH has no original content; proof is that you've come on E-H to upload your gallery in order for it to appear there. Aggregators don't scrape the originals but only the resampled 80% quality version at 1280x that's full of compression artifacts, so you're guaranteed to get a low quality raw on those sites. That said, here on E-H (where you can find most stuff, even if for some fetishes you'll have to register and learn how to get past the sad panda) there are three main methods. In order of convenience: 1) Torrents if existing and still seeded, usually that's the case for stuff released in the past few months; just avoid those with 1280x in the name as those are for the downscaled version too. 2) Archive Download link - Choose "Original Archive", may cost some GP depending on your level, stars, how old is the gallery etc. 3) Page by page, by using the link below each image that reads "Download original source" (if there's no such link, the image displayed for that particular page is already the original size).
* unless you went out of your way to resize them yourself, action that isn't needed because the site creates the various display sizes automatically.
Thanks for the translation. I was almost giving up in seeing the rest of this series translated. Hope you do the last 2 as well. I hope you use better raws next time though. Follow JukanX's advice.