Man, I don't see it being talk about here often (or at all) but under all the the jokes, sex and just how much of a dick the MC is, there actually is a very compelling story here. Like if I didn't like the idea of having a more Loving/Dominating Toph in the Love Route, I would say to just move on and do the 4th book just to know what's happening in all this.
I do wonder if the story will get wrapped up in the next book or there'll be a final book just to finish everything off. I mean, I don't see how you can get a super harem ending otherwise XD