I still don't get it why the strongest person probably in the world, in terms of magic, is totally simping to some random small country princess, when I assume he could take that slave mark off anytime he wanted..? What he gets doing that, other than him freeing himself, and beginning a life as an adventurer/magic researcher (since he did that before)... It's confusing why a story of a strong slave would be more interesting, than the story of a guy who does as he pleases, and is not someones servant...? Though that's just my opinion ofc