Thanks for the release, but for the next ones use the correct raw. The pages you've touched are 1280x1800 whereas the original posted by @Fatesifaeve is 2000x3000. That's because you've downloaded them by right clicking / save on the gallery images here, or more likely got them from some dodgy source like NH entai dot net. You came here to upload your translation, logic would dictate that you'd download your raws from here too, wouldn't it? And yet...
How to get raws the correct way: 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) there are three main methods. In order of convenience: 1) Torrents if 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).
A question here, do you have suggestions of other doujins of the sale style? In which everything happens by accidente. I really like this style, but is pretty hard to find many of these.