For reasons why the anime I mentioned LITERALLY tries to JUSTIFY SLAVERY, see https://medium.com/mos-home-for-treatises-and-hot-takes/you-ever-just-incel-so-hard-you-justify-slavery-on-the-rising-of-the-shield-hero-1-3-f2707605ad47, and the screenshot attached to this comment of the comment I found browsing Reddit, which is where I found out said anime existed.