This porn game is clearly attempting to be a real game, so I'm going to first review it as one.
The first thing you'll see after the prologue is the main town. It is absolutely massive. It spans multiple large screens and has many buildings; the buildings have tons of sub rooms and multiple floors. Houses have bathrooms, multiple bedrooms, etc - it's clear a lot of work went into designing the map. The problem is everything is too big. It is a massive pain in the ass to find anything. Houses are so big you can't just peek in and see if there are any events.
If you try to explore the town, you'll find a bunch of NPCs with markers that you can't interact with. Quests gated by story progress and lewd events gated by story progress/lewdness show up at the start, but you won't be able to interact with these people at all. With very few exceptions, every NPC is either a quest giver, a molester, or a shopkeep. The world is vast but also empty. There's no filler dialogue like "Welcome to Corneria!" or "I'm really anxious about the demon lord!" or "my neighbor's daughter has some big tits". I don't care for most stock NPC dialogue but the absence is painful. So much work obviously went into crafting this town, and it's completely barren of life. It's weird.
The combat is a mess. The main "draw" is the massive exp bonus; every time you defeat an enemy you'll gain multiple levels. You can fully expect to start at level 1, clear the first area around 40, the second around 200, the third around 1000, and so on. The problem is that numbers are meaningless - it's just scaled around you entering the 2nd area around level 50, the third around 250, and so on. So at the start you need to catchup, but it's not really any different if the game followed a "normal" experience curb. This isn't even a power fantasy, it's just a big number fantasy.
A consequence of this is that grinding in the previous area is basically meaningless. The difference between level 250 and 275 is minimal; it will take multiple fights to get there in area 2 but one in area 3. So it's always ideal to move on to the next area as soon as possible. The vast difference in between your level at the start of an area and the end means there's only one strategy: gain levels. As long as you can kill at least one enemy pack, you will get massively stronger and eventually curbstomp everything without trying. This is the obvious solution for any optional boss in an area: defeat the story boss, fight some stuff in the next area, come back and curbstomp it.
Equipment follows the same exponential growth as experience points. Equipment is also where skills come from - so if you want to use a specific skill, you need to keep using old equipment until you find something new with the same skill. This is mostly just a problem in the early areas - if skills are your only source of multi-target attacks, you'll want to hold on to them. But eventually magic makes that unnecessary.
There's also a massive narrative disconnect with the gameplay, particularly around how strong she is supposed to be.
No one acknowledges the massive, sudden gain in power. There's even an early quest where the giver promises to "see how much stronger you've gotten after hunting 10 goblins" - and ignores that you got significantly stronger than she must have intended. No one comments "hey, this girl couldn't beat that boss before, now she just curbstomped her." Knights that couldn't do anything to an enemy boss become a cutscene-threat to you after you beat said boss. She can get knocked out by some random civilian after killing super strong demons. For someone that is supposed to have power to rival the gods from her blessing, she sure has a ton of cutscene incompetence.
The protagonist and her friend are orphans, strugling to survive. Except now she's a hero and is making absurd amounts of money. Naturally, no one mentions this to her friend.
You can get pregnant, and for plot reasons give birth very quickly. And then the baby just... disappears. She makes a comment that she isn't ready to take care of a baby, and I guess just decides not to.
There's a lewd clothing system, and clothing damage. No one comments on your current attire, even if you have your tits out in town. This is largely a consequence of the town not having any real NPCs.
In short, it's not very good as a game.
Now for the porn.
It's ok. I like the art. I like her design. I like the corruption - she gets really into it in some scenes, but doesn't veer into the "sucking cocks is making me stupid!" territory. The genderbend thing is kinda weird and not really utilized. Apparently before changing he was a X6 year old that somehow never masturbated. I find that harder to believe than anything else in the story.
My preference for GB stuff is that the now-girl gets super horny for herself and has basically no boundaries with men; instead she starts off embarrassed and gets corrupted like any other porn protagonist. Except for the occasional insistence of "no I'm totally a guy!", and one instance of "I can handle your cock better than most girls because I used to have one", there's basically no difference between this GB and her just starting out as a girl with giant tits. No strong lust for women, no "dude, of course you can touch my tits, look how great they are". It's mostly just there to add the tag.
Some of the scenes are good, some are lame. A lot of them reuse the same CGs, bizarrely ones that crop out the protagonist's eyes. I don't know why that was done. At low lewdness it's bog standard molestation. Later on she gets really into it, but even then I wouldn't say the game ever goes past "average" in terms of porn.
It tried. It tried in the wrong areas. I don't think this is bad enough for 1 star, despite how obnoxious the grinding is, but it's still just not a very good game.