things like this story are quite weird for me.
like, I get (and enjoy) some more spicy fanservice scenes in more adult-oriented works, I can understand hentai works with plot, but...
well, this is not the only story that goes "these chapters we will play it all straight, then throw a chapter that could be released as a hentai by itself in the middle"
It is just jarring.
I like to think that, if I'm in the mood for hentai, I get hentai. So getting hentai by surprise like this just makes me sigh, not like I'll remember to come back to it when I do feel like wanting one.
But again, I may just be weird.
Is that kid that's holding a 'meatbone' pillow one of his 'familiar' that's set to manage one of the unused towers?
I think that's his child with the big boss goddess that has the main form of a dragon?
that was basically soul-birthed like Athena does in Percy Jackson?
if I got your description right.