I've always had a fetish for nuns, which is fairly niche, so finding this game was a treat. Having completed most of the content at the time of this posting, I can say it is a great porn game with a genuinely intriguing mystery plot, even if you don't have a nun fetish like I do, with some personal criticisms that doesn't detract from what I got out of it.
The main plot is interesting from the start, you are a priest from the Vatican investigating mysterious night-time attacks on nuns at a monastery, and the game does is good at setting up the mystery and general atmosphere. I won't spoil the game so far, but it does a great job of keeping you guessing if there is something supernatural going on or is it a more mundane explanation, and even if there is a supernatural explanation, is it good or evil?
In terms of gameplay style, it is bit different than a typical HTML real porn game. In your typical real porn game, you usually get some options in a list to progress your character or advance the story. In this you are given an overhead map of the main play area, a monastery, and can pick and choose where to go and who to talk to. It isn't necessarily open ended from what I have found. Some quests can be completed in different orders but the bulk have to be completed in a certain order, which is fine for this type of game considering the nature of the plot.
If I have one minor criticism here, it is that it was sometimes difficult to know whether I reached a stopping point of a quest because another quest had to be completed first, or I hadn't clicked on the right room and talked to the right person.
The porn content itself here is really good and there is quite a lot of it, especially like I said if you have a nun fetish, and it all works seamlessly with the plot. The slow burn or pacing with the different characters is well done, and didn't seem to fast or slow in my view. Like the dev's previous game, they go to lengths to make sure the porn scene makes sense in context of the game, rather than a series of disconnected scenes, which must be difficult to do considering how many real porn games don't go to that effort. The only downside I see is considering how niche nuns are in porn, there probably isn't a lot of content to work with. Already in real porn games you are limited by the scenes filmed but here I think the limitation is even greater. This isn't the fault of the dev, but if you take a particular liking to a certain nun, you probably won't get more content beyond their individual scene. Poor Clara.
I generally don't like more direct corruption of girls games, so I think my only larger issue with the game is how the player character is characterized. He is written to be a very devout religious man, so the turn to corrupting the nuns is a little too abrupt for me and what he does in corrupting the girls is pretty extreme, even with the justifications he tells himself. I think making him more of a blank slate or alternative paths with girls (although that would be a lot of work). Or giving more of an explicit sense of the main character themselves being corrupted first by some entity or other outside factor, would be better for me in why the main character starts making the decisions he does. Or make it so whatever is happening is affecting the entire monastery, so everyone is more pliable to corruption. Again this is just my personal preference, but the routes with most of the girls is very direct corruption, i.e. literally drugging them then pretending it the work of God, is something that I'm not really a fan of.
There is sometimes a choice between acting "loving" vs "punishing", but that seems to be more about how certain scenes play out rather than taking an actual loving path that lets the nuns sincerely submit themselves to the player.
I think it would have been better for my tastes to have him really struggle over what is necessary to finish the investigation vs staying chaste or have some more direct sense of everyone being corrupted.
But as I said at the start, having a nun fetish means we have slim pickings, and this game is well done enough, in terms of plot, content, fapability etc, that it deserves 5 stars, my personal caveats aside.
PS would love more urination content if at all possible!