Art is good but there's little to no substance in the story.
Isekai Harem wo was smut done right. It's interesting, both the plot and the porn. This is only good on the porn and it's still lacking even on that front.
the story is pretty easy to understand. it is him trying to become a God so that he can go back home and see his old girlfriend again, all this other stuff is the path I am guessing