I hate it even more when they look directly into the camera, even though in the story they're playing there is nothing there. That really breaks the fantasy for me.
Hmm, looks like R18 is still adding SOD titles but about two months after they come out on DVD. All the titles they added May 10th, have a listed release date on Javlibrary of March 10th.
DMM is even listing both dates. Example from SDAB-216:
配信開始日: 2022/05/10 (Delivery start date)
商品発売日:...
Even after their recent purge of a lot of titles, R18 still lists 6568 Soft-on-Demand titles and 415 Faleno titles, so no idea why you say these studios are missing.
You are unfortunately correct when it comes to Prestige, though.
I don't think thge credit card companies care about the DMM site because it's in Japanese and the prude American groups that try to fight online porn don't speak that anyway, whereas the R18 site is in English. In the past they'd just replace certain words with *** even when they weren't sexual...
One site claims this as translation for Zubo: SFX for jamming something inside of something else, like an arm into a vending machine.
So zubozubo would be ramming it in repeatedly. I'd probably translate it as pounding or something similar.
Sure, the subs are very low quality. However, they're good enough for me to understand the story and after a bit you get pretty good at knowing what their weird translations should actually be, so for me it's still better than no subtitles at all.
These forums have a seperate section for identifying movies and actresses, please use that next time: https://www.akiba-online.com/forums/jav-idol-identifications.121/
The movie you're looking for is JUC-525 and the actress is Risa Arisawa 有沢りさ.
The movie doesn't have a code as such as it is not JAV. It's from the French studio Jacquie & Michel Elite. Her name is listed as Shiori and this is the cover of the DVD: