Since the preservation of this genre of media is so volatile I've taken it upon myself to upload some archives of artists' galleries I liked to a hopefully permanent location. (Here)

This first one is every image uploaded by Pixiv user "八ヤミ" (https://www.pixiv.net/en/users/28556552) as of 8/13/2025

Bit of an extra thing here but there might still be a somewhat substantial amount of stuff from this artist out there somewhere. I will describe below why I think this.

FIRST, the post "ALL STAR 8 サークルカット" (https://www.pixiv.net/en/artworks/73602534) appeared to be only a cover, so I went ahead and Google Translated the post's description and it reads,

"ALL STAR 8 Circle Cut
I got a space! [Yasuzumi] Tsu 18a
Marnez is publishing an adult book!
I'm nervous about the first R-rated book I've ever had in my life...
It's a chaotic situation, but I'll do my best!"

I take this to imply that the post is indeed only a cover for some larger work. But not much info on where. It is possible for this one that the work in question was just uploaded as the very next post, given the cover of that one too.

SECOND, this post "【腐】エフマザ本「必然もまた……」挿絵サンプル" (https://www.pixiv.net/en/artworks/72473472) was rather small and sparse, many images only being some text. So again I put that through Google and it said,

"[Fu] F-Maza book "Necessary is also too..." Illustration sample
◆Mail orders are now available!
https://jackpod.booth.pm/items/1162164

Niga-san [user/20356019] will be published recently
I was able to draw the cover and illustrations for the R-18 F-Mother Book "Never Necessity is Again..."!

This is a lewd and scary story about inexpensive guys who work to get the best Ness and Luca respectively.
It is based on Ness x Luca, but the story progresses basically between Marnes and Airyuka.
It is said to be a complete version of a work that was previously posted, and it has become even more intense and erotic. So, we guarantee that those who have already read it will be fresh and enjoyable.
Since it's an NTR story, I'm sure your preferences will be different, but I put a lot of my feelings for F-Maza from both me and Niga.
If you have any F-Mother lovers who have a good taste, we would appreciate your help.

Sample text is here
illust/72110785

It seems that online sales will begin on Niga's BOOTH from January 15th!
Thank you very much.
*Please refrain from viewing or purchasing by anyone under the age of 18."

Now you may have notice this post references another post. That one says,

"[Mail order] Necessity is also... [Sold out]
https://jackpod.booth.pm

If you are new to meet you, please come and meet you. This is Niga.
We have decided to release the full version of our controversial work, "Neverty is also...."
This is a story about bad guys who try to separate the pure couple Ness x Luca and make each one their own. It's what is called NTR. And it's an R-18.
It will be sold for 76 pages per 1,000 yen, including the cover. The content is more extensive than the ones I previously posted on pixiv.

A later date, Yayami, who was willing to accept the cover and illustrations, will give you a sample of the illustrations! I'm looking forward to it! (*'▽')Kakkyauhuhuhuhu

It will be submitted by the end of the year and will be available for purchase (BOOTH) in January. If I have any leftovers I'll bring it to Orsta in March.
I want to decide how many books I want to print, so if there's a hero who says "I want it!", it would be very helpful if you could give me a comment or signal on pixiv or Twitter!"

This one has a lot more to go off of. Clearly the artist and some writer collaborated to create some quite large work. I almost thought finding this one would be easy since they provided a link to the supposed work on some site I think is called "Booth", but unfortunately said link no longer works and hasn't been archived on the Wayback Machine.

If anybody happens to know or have anything, or would even like to go looking themselves, help getting the rest of this artist's stuff uploaded here would be greatly appreciated!