I remember reading an ero manga where the plot was a girl has a crush on a bad boy type guy who isnt really into her, and he tells her she can be his gf but she has to be turned into a "dog-girl"; in the world of the manga there are "human-pets" who are people that have basically been quadruple amputated and their voice boxes removed, and it is common for people to take them on walks so it is normalized, but at the same time many find it highly controversial and horrific.
Anyway, I cant remember the name of the manga so it would be swell if someone knew, however I am actually predominately interested in simply finding other ero mangas with either a similar concept, or at least a concept that involves de-humanization being a normalized part of society, such as possibly human onnahole type shit.

Thanks for reading and hope someone can help me out, cheers