Is this mostly a porn game? I see it's extremely highly rated. Just also seems sexually intense and wondering how much more there is to it if you can elaborate a bit! I usually play "clean" VNs but I'm down for a good story if there's explicit content too.
No, this is mostly an epic story with unique and extremely well written characters that each have their own quirks, desires, insecurities, and goals. You form meaningful relationships with them, and there are only 3 instances of "side girls".
You'll find yourself adoring the characters quickly, and by the end you'll be chomping at the bit for the next update just to see the story unfold.
Admittedly it is charged with sexuality but it has never felt (to me, at least) like that is the MAIN focus.