The other reviewer left an extremely long review, so I'll put in the effort to make mine short.
For those that need a little boost to get through volume 2: Fire girl isn't lying, but she will do what it takes to get what she wants.
This story seems like your standard isekai trash: powerful protagonist, harem, a video-game inspired skill system, a dungeon, whatever. The only obvious difference at the front is that each of the characters have flaws and genuinely feel real. This is refreshing, but even so, the first two volumes are very tame.
[P.S. The protagonist isn't perverted or dense either, so that's another obvious difference from other isekai trash!]
If you happen to pay attention to the story and what the main character is doing, you'll see cracks in the character and plot that simply don't add up. The author even places a few of them in your face using a plot related mechanic, just so you're aware that they exist. How nice of him!
As it turns out, these cracks exist on purpose. In the third volume, the real plot of the story comes together and you get to see what the story is actually about. It's a dark fantasy mystery series. Have fun going over everything you read and seeing how it all connects!
It's like driving on a mountain road and looking to the left and seeing a beautiful landscape. But the road doesn't lead you there. Instead, when you turn the corner, you'll see a different landscape, just as beautiful. But you're not going to get there either. Just like this road, the author has a plot that will get you to where he wants you while seeing all these other wonderful things, and you don't have a map.
Also notable, and you only learn this in volume 3, is that the nature of the story explores the depths of human goodness, and how twisted and vile it can be. Marvelous!
