A good novel if you're not against exposition and slow pace. It's a pure fantasy novel, with some very slight video game elements (like dungeons and something which vaguely resemble exp). Despite what the covers may let you think, it's not a harem, there's a main girl Lorraine who is the only one to really interact with the MC, the other girls on covers are clients, enemies, allies, friends, student, or unknown, but their interaction with the MC is fairly limited. To start with what doesn’t work: - Too much monologue, if you have ever heard of that series, it's likely you've also heard of how much theMC like doing long monologues. And overall that not much of a problem, in fact, it helps flesh out the world and characters and for the most part they're well-timed. But the problem is that they're too frequent and some time they break the rhythm or the atmosphere of a situation.
- The pace, once again not that problematic but it's at times a bit too slow.
- The art, which is a real problem, well it's a novel so not that much but still it's ugly. Not entirely that said, the cover and color pictures are okay, but the insert pictures are terrible especially in volume 1, hopefully, it's getting better and while it's still definitely not fantastic, vol 5 pictures are okay.

Into the good parts:
- First the characters, only a rather small number are really fleshed out but it's also the only one we consistently see, and they're good, nuance, with for most a good development.
- The world-building and power system: with all those monologues and exposition the contrary would have been strange but still it's interesting and original.
- The tension, it's not that great, but it still does a good job at showing us how some characters or monsters are way above the MC, despite the fact that he appears a bit op at times.

Overall it's a good fantasy novel, with good characters and world-building if you don't mind exposition and a rather slow rhythm.

The manga is also good, with really good art but it heavily cut on the exposition.