[TL;DR A mostly text based RPG with a small, but growing number of CGs. None of which are pornographic as of 0.9]
As of the 0.9+ version of this game, the first arc of the game is nearing completion. Until this arc finishes there aren't going to be any massive changes to the MC's personality or actions. There is an element of slow burn corruption, which at the moment ends with small changes to the MC such as switching to contacts over glasses, unbraiding her hair, reading a fashion magazine over studying, and deciding to wear slightly fashionable shoes. If you are just here for porn images, there's not much here for you at the moment. The game is designed in a way that prevents you from grinding in any meaningful way. The combat has a finite number of enemies, and you don't get experience from them. Other than bosses in most cases it better to just dodge the fight if you can do so safely. My one warning (and a bit of an issue) regarding combat is that you can get into very tough situations if you try to dungeon dive while you are in a party. I would suggest keeping a few different backup saves for this reason. The character art is getting custom commissions as time goes on. The story is pretty much "isekai but with porn," but it uses the two worlds elements in an interesting way. The game is well written, and the pace it is getting content released has been very consistent.