Your world building here puts most established, mainstream sci-fi authors to shame. Absolutely fantastic.
After she's established with the initial contract and coverage, why does Yayoi need the additional money that comes along with so many strings attached? I'd think that someone used to her more austere lifestyle would quickly meet the diminishing returns point of additional money, as opposed to someone with a limitless desire for more like Anna.
You expertly address why Yayoi can't get out the situation that she's in, and she exerts her influence in the final chapter. Still, I wonder why she didn't use it earlier against the more significant encroachments on her freedom e.g. the clothing contract and the nanny (before she knows and accepts Justine). Perhaps the fear is that G&P could replace her; however, I think G&P would pay a high cost to find (or, in this dystopia, make) someone with her skillset, charisma, and proclivities.
I particularly dislike Anna, which means her character is well-written. I don't understand why Yayoi defers to Anna and allows her to treat her like she does, though. Anna needs Yayoi arguably more than Yayoi needs her after the initial contract. Anna blatantly uses her, which is to be expected in the world you've built, so why isn't Yayoi doing the same to Anna? Why does she, instead, accept Anna's dismissiveness, lies, and unreasonable demands? Yayoi holds the cards in this relationship.
You're one of my favorite authors—when I come back here to read stories, I inevitably end up rereading yours—and this is a great story. I see your writing as one of the gold standard for ABDL stories. Very glad that you continue to write them.