First: No. It is not about a deer's milk. Nor it is about a daily record written by a magical deer. Sorry to disappoint.
Second: It's the god damn water, man! Things we took for granted. You'll be very very surprised how inaccessible that colorless fluid is here. I've been living in this magical world for two years since I was transported, and I've been traveling around to nearby villages and towns doing odd jobs as adventurer, so I could -with high level of certainty- told you that water was fricking scarce.
Most village only owned one well, and the largest city I've been to only own maybe like thirty, and that was a city with population of tens of thousands.
So if you are a transported person like, when you roll in to an inn after selling all your 21st century belongings, don't you dare to ask them for a bath. I got a weird looks from the folks there when I did that, and the next day when I ventured to the town to look for a job I was immediately get mugged because apparently, they'd mistaken me for a runaway noble brat or something. Here, words about weird stranger traveled faster than twitter, so you might want to remember that.
Now that I already told you that water was scarce here, what does that exactly mean? It means you have to shit inside disgusting toilet that collecting your doodoo not too far below your ass, because flushing is water-wasting. It also meant that drinking water -at least for people with no magic- are as expensive as a decade-old wine. Most folks drink shitty ale or milk here (No, not a deer's milk). That is why there are so many conflicts and wars in this fantasy world, they are always drunk!
This text was taken from Royal Road. Help the author by reading the original version there.
No no no no, I know what you were thinking: but man, can't they get water from the rain? they just need to collect it in a big jar and then boil it for safety measure. Well, if only the air is not filled with ambient mana, and if only the raindrops don't get contaminated with it, maybe they could just collect it drink it instead!
How about getting water from nearby river? Son, have you ever heard this crazy place called Florida? If there is a place in our non-magical earth where the rivers are swarmed with human-eating being, why the hell do you think there is none here in the fantasy world? Even woodcutters have to hire an adventurer if they want to go out of the town and chop some trees here!
If that world was so dangerous that city folks had to hire a muscle for protection from monsters every time they go outside the wall, how could villages exist? Dude, it's called being poor. Everyday, the country folks betting their lives on the odds that monsters would not venture to their village. Of course, they set up some wooden wall and whatnot as an effort to keep themselves safe, but the wooden wall is something more to ease their mind, really. If they have no retired mage / adventurer who choose to live in their village because they feel the city is too much of a headache to them, then the country folks could only pray and hope.
Now that was one of the many stuff I want to tell you about things that you have to consider before wishing to live in this damn magical world. After hearing this one rant about the scarcity of water, I hope you appreciate more about the colorless liquid you never batted an eye for, and if you are a transported person just like me, always try to get your hands on water spell first!