Nah, this is just plain hentai. It's not even that fucked up of a hentai. I have seen way worse in my many years online.
Hell, most of this is reminiscent of time stop type stories. Though of course more accurately invisible stories, since y'know this is what it is. Though in this case since they're not really aware of him it's definitely closer to the time stop kind of thing. If anything, I wonder if his unknownable skill also means that they literally do not feel his chunchunmaru as even the presence of his level 1 peen doesn't even register in their mind and the queen actually only felt her fingers and did not at all feel his level 1 unknowable sword.
Because honestly that would track with the skill. Personally, I see this as a less interesting version of Time Stop Brave -
https://mangadex.org/title/08a25bd7...-settei-ja-sekai-wo-sukuu-ni-wa-mijika-sugiru
And on the hentai side, for some reason I was thinking of Nyuu or Nighthawk, but in both of those there's far more of a response from the women involved. Actually maybe you could argue Maron Maron or Alansmithee. Actually since he's fully unknowable, maybe closer to those ignorant sex fetishes that doesn't really have a proper tag yet. Where half of them can end up being emotionless sex tagged because nobody is aware of the hentai happening because their common sense is rewritten to not realize that the invisible assaulter is doing the assaulting? Yeah, probably closer to that.
So as a manga reader. This is still pretty stale trash.
As a hentai degenerate enjoyer. This is also pretty stale trash.
And I'm still not sure where the author is wanting to lean here. If it's fanservice and hentai, then it needs to lean more into it because this is still pretty vanilla.
If it's the power fantasy, it needs to start getting us there, the obvious first step is making the infinite level queenie here fall for his level 1 peen next chapter and get him the commanding authority he needs to no longer fear death if he's not in ultimate stealth mode.
If it's comedy. I ain't feeling it yet. Get better material.
Still curious enough to know where this is going and what flavor of trash this will have, outside of just oddly vanilla in many aspect. Mind you I am saying Vanilla from the perspective of a degenerate who understands that he is in no way what should be considered the norm and that the content depicted here should normally disgust normal people, as it should. But as a matter of the depiction of a vile disgusting and degenerate act. It is... pretty damn box standard.
If you've made it this far in reading this... Why did you read this? This is just the random thoughts of some weirdo online... I mean, I hope it was an entertaining read at least.
Oh yeah. A small edit. If anyone is wondering about a hentai closer to this unknowable skill utilized in an urban setting. You could probably look up Kurokawa Sahara.