Archive of Our Own

Chapter Text

Eilverra is an all right world, all told. Nice and spherical, more water on the surface than land. Orbits a sun along with 4 other planets, has 2 moons of respectable size. Atmosphere is the tried-and-true nitrogen and oxygen mix, a solid pick. Recently went through an Industrial Revolution, that’s turning out well, people can travel like never before, prosperity is coming to everyone, and there’s new Art Deco styles and vacuum tube machines that can compute numbers for you. So that’s neat for them. A gender balance that is mostly female, some “futanari” (female-presenting hermaphrodites), and as few men as you think a setting can have and still be believable. Five continents, populated with all sorts of different races, peoples, and cultures, with their own stories and art and interactions with each other. It’s, uh… got a pretty stable magnetic field going… good ol’ reliable gravity keeping it together...

Okay, there’s no avoiding it. The thing is that all of these cultures and peoples are horny as fuck. An observer from another world would find it completely preposterous. Every culture is overtly sexual down to its fundamentals, every people has their twist or their kink and then some more individual quirks on top of it. There’s a race in there who engage in violent (but consensual) “surprise sex” who can go out into the rest of the world and offer up a brutal sex-fight to other species and there’s a good chance they’ll find someone down for it. There’s no hard line between “porn” and “cinema” because damn near everything has sex in it, and you can’t even fade to black because it’s usually crucial to character arcs.

Which is weird, but good for you, gentle reader! Eilverra is a world that’s made specifically to be a fun setting to make sexy stories and erotic roleplay in, with lots of options to explore, ideas to inspire your own imagination, and the ability to do archetypal fantasy stuff or to go in interesting new directions with it. After this, each chapter will consist of worldbuilding articles that describe cultures within it and their kinks, their history and development, how those things made their kinks, etc.

Before we go into the diegetic details of the world and how you can use it, let’s talk a bit about what we’re doing and why. Eilverra isn’t just a “lewd” world, it’s a kinky world, specifically a hentai world. What’s the difference? Something that is lewd or pornographic is sexual in itself, like a picture of a sexy lady. Hentai is sexy because of the emotional core, the essence of the idea it conveys. If you were to draw out what a sexy anime girl would look like on the inside, her skeleton would be a nightmare, her eyeholes take up too much of her skull, she doesn’t have room for organs, she’s clearly something monstrously inhuman. But we don’t care, because those exaggerated physical traits on an anime girl are the essence of an idea conveyed to us. Her eyes are gigantic, but only because we pay so much more attention to eyes. Her curves are exaggerated to evoke and magnify the essence of sexy, not depict it as a 1:1 representation.

So that’s what we’re gonna do here. Hentai worldbuilding isn’t about wall to wall pornography, and not necessarily about realism, it’s about communicating the essence. The cultures described in each chapter are going to have details and histories that aren't sexually explicit, because the point is not to show an image of people doing sexy things, it’s to evoke in the reader that idea, that essence, of a world that runs by sexy rules and does sexy things. It should spur your imagination, make you want to tell a story or play a role or make a character hailing from there.

Of course, one part of communicating that essence of an entire world is making it and the people in it feel real. If everyone just does their kinky thing all the time, and there’s never anything else, they feel kind of flat, don’t they? But if you fully detail everything, then that’s boring, and you’re going to find that you can’t make your sexy society work when it gets down to the nitty gritty. I find a scenario is the best when there’s a bit of de-escalation, something that shows “hey these are still people and they still have wants and dreams outside of sex and they still have to put up with nonsense that makes them roll their eyes.” That makes the characters feel like they can have depth, and more importantly, we can trust the narrator saying “all the stuff I am not explaining to you just works well enough offscreen, don’t worry about it too much.” The people obviously have the full range of emotions, there’s joys and sorrows, so we don’t have to go digging too deep and find that this place completely falls the fuck apart when closely examined.

So that’s the goal: present articles about hentai cultures or places that evoke the essence of something sexy in the reader’s mind, make them want to engage with or experience it in some way. Present places that are some combination of sexy, funny, and interesting. Give just enough detail about actual problems that the reader can believe three-dimensional characters occupy the world and trust the implicit assumption that the world works when they aren’t looking at it.

Eilverra is a fun and light-hearted world. There’s sex all over, and everyone’s having fun with it, because everyone is some kind of horny bitch. Sex should be a good time for everyone, and it should be everywhere! Even the “darker” kinks like slavery are interpreted in the most fun and lighthearted way. Taboos only exist in a meaningful sense so that you can feel more naughty fun by violating them. Major bad things happen, like wars and murders, but they are offscreen, not that important, not that often. Aspects of the setting are built to make it fudge-friendly even if you haven’t thought everything through, so you can make up whatever you want. You can even decide the world is much darker than I portray it, if that’s your thing, and declare the light-heartedness is a comforting lie people tell themselves. That’s not my thing at all, but I try to leave some strategic ambiguities for you to interpret how you want.

Got that? Good. Back to our planet. It’ll get hornier in the later chapters after we set up the world, trust me.

Species on Eilverra evolve and take on a humanoid (and we’ll use ‘humanoid’ for familiarity even though their actual word is more like “elfanoid”) shape and posture as they develop the ability to use intentional magic. Humans are magic-using primates, but the humanoids of Eilverra descend from many many different types of creatures. Because their evolution is convergent, every humanoid race is sexually compatible. Any two humanoids with the proper equipment can make a baby, even though some couplings take more effort than others. And they do. Often. Vigorously.

This hasn’t resulted in a world of half-breeds, though, you can’t stack templates like that. Children are one of the parent’s races, with only some minor traits from the race of the other parent. Eilverran cross-species genetics is like a ridiculously large Pokemon typing chart -- different pairings have different matchups determining the relative likeliness of the kid being one race or the other. Our first two cultures are notable: “Bunny” beats everything and “Vampire” loses to everything. Fuck as you will.

There are other forms of life, too. You got your regular-ass plants and animals and bugs and hippos and stuff. Some of the big scary ones might be colloquially referred to as “monsters”, but “monster” has a specific biological definition here: a monster is any race that A: cannot use intentional magic (they probably have a whole bunch of natural magic though) and B: cannot reproduce with only members of its own species. Nobody knows why these traits come together so often, but they do. Monsters, whether savage or docile, want to use other races -- most often humanoid ones, of course -- to make babies. This is where you get your tentacle beasts from, or other forms of fantastic breeding. But some monsters are sapient and mostly humanoid-shaped, like your lamias and driders. Known as “monsterpeople” or usually “monstergirls” since almost all of them are female or futa, they can be hostile or friendly -- but they all wanna jump on a humanoid and have/make some babies.

Most monsterpeople are found on the continents of Undzuli and Xal’qubbor, which we’ll get to in a bit. Their existence there makes absolutely no sense and is impossible because they didn’t have humanoids to breed with until recently, and we’ll explain that right now.

Eilverrans don’t think their world’s focus on sex is weird. Why would it be? Sex is obviously the most important thing to any organism that reproduces sexually, so of course cultures and physiology would be focused on sex as way to distinguish themselves and reinforce their culture and values. Obviously doesn’t need explaining. The thing that does need explaining is what the fuck happened to their history.

Eilverra’s name is derived from a term meaning “land of the Elves”, except it’s not in a language anyone speaks, and Elves don’t rule this world at all, but they left ruins in places they could not have possibly built them. Historians in individual cultures would lament incongruities in their own records, things that made no sense due to lost records or imperfect understanding by past historians. But then once the telegraph was invented, they all put their heads together from across the world to compare notes, and it was really, really obvious that this shit didn’t add up.

Countries that were right next to each other had completely different languages but had obvious linguistic influence from countries on the other end of the planet they had never met. Effects sometimes happened before their historical causes, and every time it was in a year that fit the Fibonacci series. There is a period of 17 years at the same time in every people’s history where literally nothing happened.

The major prevailing theory is known as the “Time Scooch”, which is also the reason you don’t get to name your own theories any more. The theory goes like so: this world was once ruled by an incredibly advanced race of Elves, progenitors to the modern Elf races, conjecturally named the “Grey Elves”. They had magical and scientific power current society can only dream of. And then they did something really, really, really stupid, and retroactively erased themselves from their history almost entirely, leaving only some implausible structures and lost artifacts that were created by nobody. Time and space had to “scooch” events and places together to keep the world’s timeline mostly intact while retroactively removing the Grey Elves, and sometimes it was a messy paste job. Countries maybe had to move around so that they could interact with each other and create events that originally involved both of them interacting with Grey Elves, the progression of history had to be massaged a bit, there’s gaps and sticky bits and parts that don’t work too good if you think about them too much but it worked didn’t it so what are you complaining about. This doesn’t invalidate history, the past that people draw meaning and identity from is real, but maaaaaaaybe it didn’t happen in that order or involve exactly the same people.

There’s also, like, a really obvious place for a sixth continent to be, where peninsula on the other five are pointing to and would serve as perfect land bridges. Kind of obvious in retrospect. Whether the Grey Elves were omnipresent and all peoples of Eilverra were their engineered servitor races, or they were absentee landlords holed up in ivory towers contemplating mysteries of the universe, or the stupid stupid thing they did was what made everyone so fuckin’ thirsty in the first place, nobody knows. Frankly, most people don’t care.

Of course, just as fundamental to the world as the land itself, is the magic. Magic is everywhere in Eilverra, it is a simple fact of the world. At some level all living things utilize magic, though only sapient beings can do so intentionally. Many beings have forms of natural magic that work much more effectively and efficiently than most forms of intentional magic, but natural magic complicates your personal aura and makes it more difficult, but not impossible, to work intentional magic. Monsters have enough of their own weird magical bullshit going on that intentional magic is impossible, but that doesn’t necessarily mean they aren’t intelligent.

Matter is made of the physical, and magic draws from the ephemeral. Significance, potential, and meaning are made of magic; no intentional magic can disassemble this but natural magic can redirect this energy to its own ends. Mana suffused everything in the world, as everything has potential. Mana accumulates and is expended by all living things, and accumulates in quartz crystals. Mana is expended to create magic; most natural magic is efficient enough that it draws from the body’s natural mana reserve without making a noticeable difference, but intentional magic needs external mana reserves. Magic is cast by constructing “sentences” in the language of magic that enact the desired results; they can be inscribed in runes or sigils, or spoken aloud and laboriously envisioned mentally until it becomes familiar enough that it can be invoked by “muscle memory”. Natural magic is probably inscribed on the being’s DNA but nobody has figured out how, or how that would even work with vampires since they were originally other races.

The ultimate expression of Eilverran magic is known as the First And Final Invocation: a spell that does literally anything the caster wishes. It allows the user to become omnipotent, utterly reshape the universe to her whims, become as far above gods as gods are above mortals.

This spell is not an ancient occulted secret. Every student of magic learns this spell on the first day of their studies; it’s incredibly short and simple and takes two seconds to speak. The purpose of learning this is not to know the spell, it’s to know something else about the spell: if every single atom in the observable universe was its own universe, and every one of those universes had every square inch of it filled with raw mana, and you had access to all of that mana flow, you would still not have enough mana to cast the First and Final Invocation. There isn’t enough room in the universe to even write down the mana cost of the First and Final Invocation. They’ve had to invent new forms of denoting large numbers to be able to refer to the Invocation’s cost and modern vacuum-tube computers can’t calculate how many digits it has.

On day 2 of magical studies, you learn how to snap your fingers and create a flame, expending only mana inside your body and not enough of that to notice. That spell takes two hours to invoke the first time. Learning Eilverran magic is not about raw power; learning Eilverran magic is about efficiency. The primal language of magic has 13 verbs and innumerable adjectives, adverbs, prepositions, and conditionals, each of which reduces the power and scope of the spell and thus its cost. Knowing your own magical imprint is very valuable because you can exclude use cases that you won’t interfere with, and beings with natural magic can’t cut as much cost this way. Osmium is known as the magic-proof material, because one of the fastest and easiest conditionals to learn is “this spell can’t work on osmium” and leaving that out will massively magnify the mana cost. Different magicians specialize in different conditionals to make their spells castable. Maybe you can use your magic against certain types of people, maybe you need certain weather conditions, maybe you specialize in physics you know well, maybe you’ve figured out resonant material components that work well with your specialty. Because of the Magical Market Hypothesis, magicians will often keep some of the modifiers they know secret, so they can get more of a benefit from them over a greater time before the cost corrects.

The “Magical Market Hypothesis” described by Orcish wizard Graelvur is not technically accurate but close enough for any real use: magic spells can be modeled as trading mana to invisible agents, and the costs and values of spells and their components fluctuate with the volume of trades. This means that mana costs can go up and down over time, and while you may theoretically find a way to “beat the market”, costs will correct themselves and fix any hole you find. What is plausible today, may not be plausible tomorrow. You may have a really, really good spell that you need to wait for just the right opportunity for.

Consent is an important part of most magic that doesn’t just sling energy around. Knowing your own magical profile as precisely as possible is crucial to efficient spellcasting, and knowing your target’s magical profile can give just as much of a bonus, allowing lots of effects that simply aren’t efficient enough to ever use in other situations. Spells of protection, enhancement, transformation, charming, scrying, sensory exchange, all of that stuff generally needs the consent of the target and enough time for them to relay their magical profile. Of course, that’s not to say these things can never be done without the target’s consent; they’re just much harder, cost much more, and can only work on specific types of targets. Two forms of magic that would completely break any setting are mind control and resurrection, so resurrection is functionally impossible and bad things always happen when you try it, while mind control is in theory possible but it’s very difficult, often limited, and requires the caster to constantly adjust the spell on the fly.

A good Eilverran spell doesn’t just do what you want, it is crafted that it can’t do anything you don’t want. Just like how you use it in a story or ERP! Magic is versatile enough that it does what you want it to do as an author, but it won’t break the world or your scene because it can’t do anything you don’t want it to. It’s just too inefficient to break the story! And you can change your mind, too! Want something to be impossible that you did before? Maybe something about the target is incompatible with the previous spell, or maybe the market just corrected itself. It’s magic. You ain’t gotta explain shit.

So, as you might expect, a world with magic and wizards was in Medieval Stasis for a long time. Wizards can do lots of useful things, things us normies can only dream of, but it takes a LOT of study and a LOT of practice and there simply weren’t that many wizards.

Over time, people would slowly mechanize their tasks just to get them done quicker without having to schlep all the way over to a wizard. Several peoples invented the steam engine independently, and that was a great leap in technological progress. But the discovery that really kicked off the Industrial Revolution was the harnessing of electricity: Electricity in this world operates on principles of magic instead of physics, meaning that it serves as a form of mana. Someone discovered that electricity can be sent through a closed circuit containing a magical sigil and activate the spell. Spells involving any discretion on the part of the caster don’t work, and the process is less efficient than direct casting so the effects possible are much more minor, but thanks to electro-magic now everyone has access to spellcasting. Technology and commerce exploded. The world was linked by telegraph, then telephone, wirelessly mirroring motions and sounds from one magical node to another. Rather than costly teleportation to limited locations, vessels could be fitted with electrified lightness sigils and create commercial air travel. New methods, new techniques, new styles were developed by a world that suddenly found itself able to just do way more stuff. Travel went from arduous to commonplace, peoples were able to create goods like never before and then trade them for exotics they scarcely could dream of. And of course, go abroad to fuck exciting new people and make all sorts of new forms of porn. It was pretty kick-ass.

(Of course, the arrogant High Elves had this shit the whole time and never told anyone until the non-Elven technology surpassed theirs. Dark Elves actually also discovered this technology, independently, centuries before anyone else; unfortunately it was during their murderous dark days and instead of spreading this knowledge its discoverer kept it secret for decades and then someone had him whacked.)

Unfortunately, Eilverra is in another sort of “medieval stasis” now. The Industrial Revolution happened like one or two generations ago -- short enough to be conceptually “new” but long enough people are starting to adapt and younger people grew up in it. Technology, and aesthetics, are mostly at the level of our 1920s to 1960s. But the next step in our technological development, the computer revolution, can’t happen on Eilverra: since electricity works on the principles of magic, fluctuating values for power and resistance mean sensitive transistors are impossible to create. The best form of computers they got use vacuum tubes and there’s been little development there. So you can have modern-ish technology, but don’t have to worry about computers and the Internet ruining everything.

One other effect of electricity being magical: while the nervous systems of all living beings are fault-tolerant enough to still work when the voltage on their nerves goes up or down, there are areas where this isn’t enough. The rich, unexplored continents of Undzuli and Xal’qubbor had no humanoid civilization because their mana fluctuations are much more severe and humanoids would experience severe seizures as long as they were there, until it killed them. Only animals and monsters lived there. Now, though, there is a cheap and easy electro-magical treatment to prevent this, and humanoids can now seek their riches and adventures.

Of course, you can’t have everything be great for everyone, in a fantasy setting you will need some Forces of Evil from time to time. Aside from mortal nations being assholes, this role is served by something called the Foul.

The Foul lies underneath reality, underneath the concept of reality. It is a void. It is wasted potential. It is that which never was, never could be, and looks with hatred and envy upon all existence. It has a mind, it has a will, and it is a total dick. All it wants is to unmake everything, by smashing it, usurping it, corrupting it, but if it can’t do that it will settle for ruining people’s days. The Foul can’t create anything itself, as it is a void of creativity. It can offer deals, bargains to living things, aspects of the world: powers that could not be, if used to unmake what is. Nobody knows how it makes coherent bargains with animals and other non-sapient creatures and rocks, but it definitely does, and that’s where Great Beasts and Sea Colossi and forest monsters and all that shit come from, as well as your evil wizards who make dark pacts with dark powers.

Fortunately, since the Foul can’t be creative, the races of Eilverra can develop reliable ways of dealing with its bullshit. Nowadays, outside of Xal’qubbor, there’s pretty effective measures in places where the Foul is known to get up to its nonsense. They’ve had their whole history to get a handle on this -- they figured it out. You can still do things involving fighting this Evil Force, of course, you can have something new and unexpected, you can simply have whatever you’re doing be the method that the Foul is dealt with, but it’s there for your dark force needs and it isn’t an all-consuming threat that makes everything else irrelevant. It’s also a great excuse to blame your clumsiness on, it’s the Foul messing with you.

Scientists theorize the Foul may be the hole in reality left by erasing the Grey Elves, but that’s not the best explanation because of how thorough records are of dealing with it. It may be an unavoidable side effect of the fact that for things to exist, maybe something has to be defined as not existing, and that thing is an asshole. Maybe it’s the retroactive memory of all the gods everyone stopped believing in. Whatever it is, fuck that guy.

So Eilverra has five continents now, though only three of them are occupied by civilization to any extent. Funnily enough, they all have different central motifs to them that help an outside observer categorize what their cultures are all about!

Symbi is occupied almost entirely by humans, with smattering of other races that are deeply entwined with humanity. The cultures there are about sexual aspects of purely human organization, or fantasy species defined by a relationship to humanity. You can remember that because its name is the first part of “symbiosis”.

Talai-Gurvik is about 45/55 humans/everything else. These cultures can mix together and affect each other more than the others, and have an emphasis on how they contrast and interact with the other cultures. You can remember that because its name is two obviously different languages mooshed together.

Etrangia has no native humans on it, just non-human species. Most of these peoples are kind of isolationist: they have affected each other, but not as much as on other continents, and they tend to spiral off into some weird directions. This is for two reasons: their wildly varying physiology and organization means they have less in common and less to offer each other, and for much of proto-history the Dark Elves were kind of fucking with everyone. These guys have more of an element of weird sexy physiology, or cultures and histories extremely dissimilar to humanity. You can remember that because “l’étranger” means “the stranger”.

Undzuli is full of Elven ruins and monsters. Monsters are defined as beings that can’t use intentional magic and can’t sexually reproduce with each other. They need to use (which means fuck) other species to make babies. No significant civilization existed on Undzuli because the severe natural mana flows would cause serious illness and death in magic-using visitors, which all sapient non-monster species are. A treatment has only recently been developed for this, opening the resources and ancient impossible treasures of the continent to exploration. Everyone wants the treasures of Undzuli, and its native monsters are interested in the new travelers for legitimate and illegitimate reasons! This is a place for sexy adventures into the unknown! You can remember because “Undzuli” sounds jungle-ey. At least I think it does.

Xal’qubbor is like Undzuli except it’s fucking frozen ice floes, relics and ruins that not only cannot but should not exist and yet do, laws of magic and physics are sometimes more like suggestions, and the creatures within are gibbering and squamous. The Foul is strongest here. “Xal’qubbor”, it should go without saying, is not a word in any language that ever has or ever will exist. This is the place for horror adventures, for those of you into being fucked by Shoggoths. You can tell because anything with an apostrophe, X, Q, and a double B is eldritch as shit.

Can do! At the top of each chapter, there’ll be a content warning, with kinks in order of most to least important, so you can tell if it’s something you’re into -- but you may want to check it out anyway, because these guys have some unconventional takes on kink you may find you enjoy! We’ll have the bit about their history and culture, and then a few drabbles to set the mood and provoke ideas, and then a section about creating characters from the people who were just described. With a special emphasis on “why they might go out in a group of 4 to 6 people of diverse backgrounds and skillsets, and have sexy adventures in the civilized or uncivilized world.” Turn to the next chapter and let’s get started with the Bunnies!