This series started off so fucking stupid. But I mean, it all kind of explains itself when his origins are revealed, which made things a lot more interesting instead of stupid. My only problem is how he's explaining his goal. Sure, make a harem and shit, but don't just plainly make it seem out of lust when even MC knows it's not. Just fucking explain that you need to find multiple wives to procreate and upstart your family tree once again. Like, he's more than just some royal too, his family line is the peak of all races and it would be more of an honor for other races to be part of his harem than anything. Ego aside though, there is more of a sense of responsibility to his goal too. It's part of his lineage to pass down his genes, like nothing purely sexual but that it makes the next generation stronger than the last.