God, Don't even know where to start talking about this masterpiece.
There are things I think could be better, but there's zero doubts that the good points extrapolate the bad ones in number.
The read is extremely enjoyable and I think the way the author builds the environments and the characters encounters is just peak.
Art: 9
Normal anime art. The drawings are not usually an important aspect of LN, like it is regarding manga, anime and VNs, but well, it is still nice to comment about.
Art is cute, depicts the characters in an enjoyable way. Not much more to say.
Story: 7
Hear me out. It's not like I'm saying the story is bad or something in those lines, it's just that it's a normal story with normal plot events, but the story is not what really makes this novel a 10 (IMO). There's not really a more profound view in the aspects of the world, like the cultures, countries (geo-social-political way) or psychological insights, but it's a comedy, so we can leave that aside.
Even though I said that, it's important noticing that, even with me saying those aspects are not really exploited, if not just not exploited at all, the comedic build-ups and the general pace of the events is just top-tier. Made me giggle in more scenes I can count with my fingers. And those last, idk, 3 chapters of the 17th volume T-T
Characters: 10
This is where the story shines, and it shines really bright.
Each character is specific, meaning every individual has it own traits. Each character is highly memorable and each of them serves a purpose in the story as some "archetype". Each of them is a gear, without which, its not presence would be highly perceived. Sometimes the whole machine would stop working. Every character is different in many ways, and the interact with each other differently. That's where it shines. If you would take Aqua off the equation at some point, for example; her missing would be perceived. The characters interaction would feel a little less brightfull. It would feel like definitely something's not right. Even though she is sometimes annoying as fuck, she would still be missed, for her being a important character in the general web of interactions. Not sure if what I'm saying is strange, but that's it.