Exactly as it says. We have a rather OP and cunning MC. A certain event makes him lose all trust in humanity (Especially guys), He builds a dungeon, he builds a harem, he conquers everyone around him.
Do no expect the nudity and sex to be a side snack (like quite a few adult seinen), it's the bread and butter in this series while the plot is the side snack. Fortunately, author does write a not-too-bad plot.
That said, it gets repetitive really quick. Aur wants to do something (or about something), he gets his eyes on a female, either the female submits to him or he rapes/'coerce' the female into his slave, the 'slave' REALLY adores him after that, he gets whatever objective that he wants. I do applaud some of the subtler and cunning things he does, and magnificent bastards like Aur are a dime a dozen as MCs, but I do wish we can see him up against an opponent who is just as magnificent as a bastard as he is... and Aur gets NTR'd by that person. Just to we can see the despair and anger on his face, just for the fun of it. Of course, the opponent he's faced so far, some have made him lose his stone-faced facade but he still manages to recover and turn the tables just as quick. Somewhat of a disappointment for my sadistic heart. Not even in the LNs have we get something more satisfying. Hence, expectation on this improving is not high for the manga.
The few comedic moments are not too bad. Nicely slipped in between Aur having sex with everyone, or when they are planning something. The series is not all about Aur having sex with all the females. It does have some nice battles going on, but nothing on the levels of Action-focused nor even Mind-battle focused Seinens around.
Characters-wise, they tend to be a little bland. The males apart from Aur get a few shots if they're lucky, a certain male in recent chapters gets a bit more time but nothing too much. The females gets fleshed out (Obviously) a lot more, yet they all tend to be slaves of desire for Aur after he has his way with them. What this does is that even when Aur does manage to 'coerce' a female to his harem, the impact is light, sometimes even disappointing, especially when after one sex session, they all just LOOOOVE his meatpipe.
The 'coercion' with Alan's party was not too bad, expecially Wikia but it still lacked that impact when you read an good NTR story. The same with our esteemed hero (who got into the same repetitive plot again) in post-vol.3 chapters.
It is such a waste, since it is not often you get this kind of setting (Evil guy, Rapes and NTRs all females to his harem, kills all guys who he doesn't like) and that Evil guy is the MC of the story. Such dissatisfaction.
Even Aur's own motivation for all the things he does is rather... bland. The way he lost his trust in humanity is... stupid and rather immature at the very least.You'd think having 7 decades of live would make his motivation be a lot... grander, less teenager-like, and more... evil. This is just my personal feeling though.
Visual-wise, Komiya-sensei has always had a nice way of drawing characters. I am glad they did not use the rather stone-faced looks of the LN design. Being the type of manga it is, censorship is only lightsaber meatpipes for the males (Aur) and barbiedoll nether region for the females. Certainly not something you want to read in the open. The females does look exquisite enough to just read the manga to see the without worrying much about the story. I do think the facial expressions can be improved, some of them look rather awkward for the situation they are in.
All in all. If you're used to stories where you are the bad guy and you keep using underhanded but cunning tactics to get your victory, this is not a bad thing. If you a sadistic heart and you can empathize with an evil MC, not a bad thing to go through once. On the other hand, it's not something you will read again and again even if you like the genre it contains.
On the other hand, even if you're used to some of the darker seinens, but if you're not used to a guy pretty much raping and NTR-ing everyone into his harem, you probably won't like this series. It does not have much in terms of other fruits of delight. It's probably a level higher than most stupid Harem-making-because-I-have-A-cheat-power WN/LN/Manga out there, but it isn't that grand of a series. Merely something you pick up, flash through, and put down.
I would give it a 7 if we get more despair in this series, but alas, a 6 is most that I can give. Mayhaps it can change in the near future.