I don't think this guy has been posted, he's kind of hard to search. I'm assuming most people know about him already but just in case some don't. His work mostly isn't straight breast expansion, it's more like milf transformation, I guess? Breast expansion with weight gain and ass growth.
Anyway, my favorite animation of his is attached, but you can find a lot more if you scroll his twitter:
https://twitter.com/MaFaVaM
Btw, he did do a pretty long, straight breast expansion scene recently ("Succubus' Tits Job") , but it's pay-walled on his Patreon unfortunately.