Yes.
The author is knowingly hitting every standard trope.
And the MC will remain a virgin until his death, as he has so many perverted desires to fulfill that actually doing the deed will never have a chance to occur.
And... as I thought, the MC was totally oblivious to Belphegor's actual sex, thinking she was male.
I will admit to being surprised/not surprised that nothing perverted was done to the female woodhead, given the detail that was paid to her appearance... This is merely rated ecchi, not hentai, so going there did not occur.
And those two at the end of the chapter?
They clearly have the correct idea: Set a pervert up to oppose a pervert, for the lols.
Bets on whether the MC can form a subordination contract with Belphegor as the subordinate?