They say that curiosity will kill a cat, but the question as to what it might do to a human is never really expanded upon. 

For one man the question became rather obvious after Cameron began browsing through the local library's 'occult' section late into the evening. The twenty-eight year old had always had a curiosity over the nature of the hidden secrets of the spirit world, however being a modern man who often whipped out his phone to find his location using the global positioning satellites stationed in orbit he was smart enough to know that no matter what secrets may have been hidden in the pages of the books he read...it was all hooey at the end of the day. That didn't mean that he wasn't interested in knowing what others had written down on the subject. Far from it. 

Perhaps it was the feeling of knowing something that the average person wasn't supposed to be privy to that made Cameron eager to read through the countless pages of text that he could get his tanned skinned fingers on. Like finding out a secret that everyone knew about but wouldn't say, the man found himself quite eager to scroll his eyes along the various glyphs, sigils, and other arcane drawings which were splattered all across the pages of the musty tomes that he pulled out from the bookshelves in the various libraries and occultist shops around the city; of which there seemed to be more and more as of late, for some strange reason. Of course he didn't try and actually perform any of the rituals which were lodged within the yellowed pages, and not because he was afraid. This was all just silliness that he often filled his brain with instead of the latest internet scandal on Twatter. No. He just didn't want to end up spending his money on expensive plants, pungent oils, and cheap looking colored candles. 

If he was going to go through all of that then getting laid was going to be his reward for the effort in question, not failing to summon up some hellish entity which didn't exist. 

With that said though, Cameron found himself deeply immersed within the grimoire which he had pulled out today. Apparently the author had chosen to make the writings within focus on the subject of succubi and incubi; the sexual deviants of the netherworld, as he so elegantly put it. The man found himself fascinated by the creatures, as while he had heard of them before, and the nighttime activities for which they often participated in, most authors never went more than surface level deep when it came to detailing the forms, habits, tastes, and history behind the sensual creatures. The author of this book however, went all in. Cameron bit his lip when he felt his cock grow hard within the center of his pants; it had been a while since he had gotten a good nut in, and so he found himself struggling to control the flow of blood within his body as he looked over the nubile form of the succubi while seemed to almost pose for his pleasure.

He chuckled to himself as he thought about the irony of what he was doing; he hadn't been this captivated about looking at pictures of nude women since he was in highschool. He then laughed out loud when he thought about how the author might have created this book as one of the earliest forms of pornography one could have back in his day. Because he was so far back in the library he didn't have to worry about his little outburst being frowned upon, yet he silenced himself all the same out of respect for the civility which had been ingrained inside of his head since he was a toddler. 

Moving on ahead, Cameron read through the book as quickly as he could, if only because he wanted to get home before it got too late in the evening; there had been a string of muggings around the area which had made most of the white collar members of the neighborhood fearful for their possessions, however while he wasn't afraid of being mugged, he knew some martial arts after all, he didn't want to take the chance if he could avoid it. 

As his dark eyes moved across the pages of the text he never noticed the full moon outside peeking up through the grimy windows of the library to stare at him. He did notice how hot his body had started to become once he looked over the handsome visage of a smirking horse-like incubus with just the right amount of muscle cut into his arousing dark skinned form. Page after page of the tome seemed to go out of its way to show how the devilish creature's long, serpentine tail could weave intricate patterns along the demonic entity's equine legs, all the while its heart shaped tailend would wave around rather playfully, like the lure end of an anglerfish towards the reader. 

Because Cameron was more interested in women than men he didn't cast his eyes over the large length of the stallion's manhood and fat, oblong balls for too much longer, though he couldn't help but chuckle when the hellion bent himself over and then spread the cleft of his black furred ass open to expose a winking pucker which dripped with inner lubrication that all succubi and incubi produced. The fluid in question acted as both an aphrodisiac to entice potential lovers/meals/conquests to mate with them and as a moistening gel which could make the roughests of sexual intercourse feel pleasurable, because despite how they might seem the hellions in question could feel pain just as intensely as pleasure. A fact which the author was very clear on as he showed the same incubi grunting in painful ecstasy as an invisible assailant whipped his body again and again until jet black blood began to pour out from the lines drawn along the equine's handsome body.

Moving on to the lustful succubi, many of whom were spread out in a veritable of positions on plush looking pillows of all different colors and styles, one was even bent over and blowing a kiss at him, Cameron found himself having to wipe down his face several times as sweat began to pool along the front of his face. When a couple of droplets of silvery moisture splattered onto the pages of the book he quickly pulled back as if stung. The last thing he wanted to do was ruin such a novel piece of text, not only because it would have been reprehensible of him to do such a thing, but also because he didn't want anyone calling him to report damages to the books. 

Turning his head to look at one of the security cameras pointed directly at him, the man smiled nervously as he made a show of wiping his face down, never once noticing that the red light which usually blinked along the side of the video capturing device was sputtering out. The only thing the man was aware of was how hard his dick was as the piece of flesh stuck onto the base of his crotch throbbed like a caged animal wanting out of its confining enclosure.

Of course he didn't let the beast within escape, he was in public after all, however the wet stain which was growing along the seat of his pants made it so that he decided that now was a good time to leave the library. He could beat off as much as he wanted to the thoughts of the sexy succubi leering almost mockingly at him once he was safely inside of his stuffy apartment complex several blocks down from the building. Picking up the well worn book, Cameron placed it back onto the shelf he had pulled it from. He then gaped in surprise when it seemed to jump out from where he had stuffed it. Taking a minute to reason how impossible that was, he chuckled to himself before returning it to its rightful place once again. 

After he was sure that it would leap out at him again, he went to the front desk to bid goodbye to the librarian. The other man waved back at him, though he didn't pull his bespectacled face up from the book he was reading, seemingly too engrossed in whatever it was that had captivated his attention. Not wanting to bother him, Cameron gave a small shrug as he exited the eerily quiet brick and mortar building. 

Making his way down the stone steps, Cameron found himself panting and shaking his head as he felt his body heat up again while under the watchful eye of the full moon. He tried to ignore his feelings, yet the pressure inside of his pants would not let him do so by the time he passed through the gate which led to the city beyond, and so by the time he got a block away from the library he forced himself into an alleyway in order to do the unthinkable. Cameron wisely flipped his head around to make sure that no police or homeless or wandering dogs were coming by, as the last thing he needed was to draw attention to himself right then, before pulling down his pants's zipper and then fishing out his erection. Only when he did so he found that there was a lot less there than there should have been. 

Being a modern man who prized his penis as much as he did the air he breathed, he quickly tore his pants down from around his hips to see what in the hell was going on. The sight of his cock, which was usually about three inches soft and a very pleasant seven when hard, dwindling before his big brown eyes like a worm sinking into muddy earth made him drop his jaw. The fact that his balls, the size of a ripe tangerine when held together, were shrinking into raising made him lose control over his legs. Luckily enough he was able to catch himself before he could face plant into the ground, though in doing so he actually managed to tear his pants. How this had happened he wasn't sure, but in flipping his head around to look at himself Cameron quickly noticed that his ass was getting much bigger than it was supposed to. Couple this fact with his chest heating up in a rather strange, yet not quite pleasant manner, and he was almost sure that something was wrong here. 

Taking a few deep breaths to calm himself, Cameron attempted to slow the blood rushing into his head, as the sudden onslaught of a headache was making the impossible seem rational right then. It was a good thing that this was the case, because it helped him to not notice how his dark hair was growing down the side of his body, brightening from a dull copper color to a bright red on finally to an almost glittering pink coloration as the lengthening locks drew further and further down to his jiggly asscheeks. 

Once it no longer felt as though he had a marching band trying to take step along his head the man slowly lifted himself off of the grime covered ground. It was while back up on his feet that he looked down at himself. 

Yep. He was growing tits.

Big ones at that, seeing how slow, yet surely his chest was ballooning out the blue t-shirt he had chosen to wear that day. 

Realizing that this all had to have been a bad dream caused by something that he ate, followed by reading a book about sex demons, of which was floating behind him well out of the sphere of his notice, the man decided to laugh about what was happening to him as he kicked his sneakers from off of his sock covered feet. Once free from the confining bit of leather, he then set about stripping out of his torn pants. The feeling of the night air brushing along his heated thighs, of which were gaining extra added mass to collectively hold up his plumping rear end, felt like a balm to his senses. Fanning his face, the changing human pulled his shirt up from off of his chest, something for which his new breasts were quite grateful for as his...her?...nipples at their front poked out almost in glee from being freed at long last. 

Now almost completely nude, Cameron didn't bother wearing underwear since the feeling of them around his waist had always made him feel uncomfortable, the transforming man allowed himself the pleasure of soaking in his shifting body. Moving one of his hands down the side of his slimming torso, he quickly took stock of how the flesh which had been expanding his midsection was sinking into himself at the same time the last of his cock and balls were disappearing out of sight. Grunting in confused frustration, he didn't have long to idle over the loss of his manhood because soon enough his crotch was burning with an inner fire that was desperate to get out. Rolling a finger down to his smooth pale groin, the man hissed when he noticed a wetness pouring free from what should have been nothing more than a rounded plane of skin. 

When one of his digits sunk deep inside of himself his knees decided to say fuck it and give out.

Falling down onto his thicker rump didn't feel as bad as he thought it should have, but that was before he felt a sharp pressure tugging at his spine. Bending over and then shaking his ass to try and alleviate the tension within did him a little bit of good, at least until his bones decided to move around in ways that were not exactly pleasant. The popping of cartilage made Cameron wince, however the noisy ambience was less frustrating to deal with as compared to his spine elongating to grant him a tail. 

A tail? 

Turning around, her darkening eyes widened in surprise as she noticed that, yes, she now had a tail, a slim one that seemed to wave around like a curious dog at that. Flexing the new appendage came much easier than she would have realized, as her brain was adapting to the new changes well enough to let the rest of her know that everything was alright. This was why she didn't bother freaking out when the bones within his back that were connected to shoulder blades began to wiggle around and then push out from her skin. A sharp bark tore through her fattening lips as new wings tore themselves free from his body. Serene gaped when she saw them, as they were a sickly pink color, which made sense given the red ichor dripping down the side of her body, but soon enough they grew dark with color, the same as her lips. 

Flexing the new appendages proves that, while they weren't big enough or strong enough to do anything more than fan the sweat soaked air around her , they did help to relieve some of the heat which was curling along the edge of her flesh like a living wave.

'This is fine,' her brain told him over and over again as she looked at her new extremities. 

This was a good move to make for that part of her being, especially when the skin on her head split apart to make way for her new horns. The headache from before returned with a vengeance as Serene's new bone-like antenne crept up into the air with a confidence that was almost marvelous to see, given how human their owner had been not more than ten minutes prior. When they started to curl in on themselves the demoness let out a sheepish moan for a reason that she wasn't really sure of, but it seemed like the right thing to do, all things given.

Once her horns had fully set themselves into place about a foot into the air, the demoness grunted and then returned her attention to the wet snatch which now fully sat itself in between her legs. The new nerves which lined the fleshy interior was rather odd to feel, as it was so much more pronounced than anything she had felt before; she had never been into assplay, thus he had no idea if this was normal for a man to feel. Was she even a man anymore? Probably not, given how her new jugs swung in front of his chest. Serene wasn't sure how to feel about that at first, but the longer she played around with himself the more confident she became with the idea that her change in gender was fine. 

After all, this was all a dream, right? So what did it matter at the end of the day.

This all became a rather moot point when the sounds of shuffling feet made their way into her newly tapered ears. Lifting herself up from off of the ground, the new succubus snickered when she noticed several men armed with guns on their hips and knives in their hands gaped at her like fish that had been thrown out of water. 

Stepping out from the shadow of the building, the would-be muggers didn't know what to think as they looked at the strange woman...creature in front of them, however they didn't have long to contemplate what they should do next once she bent over then blew a kiss at them.