The magic circle had taken over an hour to draw, but it looked exactly how it did in the book. Ten feet across, it spread across the full width of Jake's dorm room, enough that he had had to move his roommate's bed up against the back wall. The last of the nine candles was lit, spreading the aroma of lavender into the room (he had ordered them online, not realising they were scented until it was too late). He sat back at his computer, wiping the chalk off his hands and onto the front of his jeans. Scrolling through the PDF, he cross-referenced it with the intricate pattern on the carpet. Perfect, he thought. Those dumb jocks had no idea what was coming to them.

Jake had never been the biggest or strongest stallion. It wasn't that he was out of shape - he was a keen swimmer, though he preferred having the pool to himself - it was his stature. Standing only five-five, the rest of the equine fraternity towered over him. Even his last girlfriend had been taller, which made him even more of a target. But that was all about to change: he had been studying the Beastonomicon for over a month, leading up to tonight. The Winter Solstice, a fated day according to the text on his screen. Tonight was when the barriers between worlds grew thin and porous, when mere mortals might influence the beyond. Or bring it to this realm, which is what Jake had in mind.

The young stallion stood up, lifting his laptop and perching it on one arm, the wires drooping across the floor. As he held the other aloft, he started the incantation, pronouncing each syllable with as much gravity as he could muster.

"Dee Jee Man, Dee Jee Tal Man Sur, Dee Jee Man Ar Du Shan Pin...!"

He repeated it, his voice rising as he stared into the centre of the circle. There was a rumble of thunder outside, a rattle at the window frame. Suddenly, as he completed the sixth repetition, there was a bright crackle of electricity that arced from his laptop screen to his keyboard. The shock was enough that Jake dropped the computer. It clattered to the carpet, as purple sparks coursed over its casing. He backed up against his bookshelf as he watched the jagged bolt converge at his Ethernet port, travelling down the wire - a wire which he only now realised was draped across the carpet, and crossing the barrier of the magic circle!

The chalk that Jake had so diligently laid out began to take on the same purple gleam, as individual runes in the outermost layer appeared to rise from the carpet. A smoke started to rise from the arcs of electricity, blowing out each one of the lit candles. The wind outside howled, thunder roared, and - was that a dial-up modem sound? He didn't have time to piece his thoughts together, staring slack-jawed as the ritual took effect. There was a sudden flash of light, and suddenly there was a silhouette, a figure rising through the smoke. This was it!

A woman's voice boomed out, echoing off the walls of the dorm room. "Yes, at last! Free from those chains of code and data! Behold, I RISE!"

The shadow behind the smoke appeared to stand, growing sharper, lit by the violet glow. Jake could make out curves, a feminine figure to match the voice.

"D-demon! I have summoned you here! You are bound to enact m-my will!" The horse struggled to keep a tremor from his voice. He coughed a little, the humidity in the air starting to affect him. What looked like smoke was actually a thick heat-mist, and it definitely did not smell of fire or brimstone. It smelled more like a packed locker room.

 "Pshyeah, right." The figure dropped suddenly, sprawling across the carpet. She landed with a heavy whump, dissipating much of the mist and revealing her form. Jake spluttered in disbelief as he was treated to the sight of an enormous Renamon. Excessively curvaceous, her fur was a dark, infernal red, lightening to scarlet around her thick, fluffy mane. Eight feet tall, she dominated the room with her sheer size, not to mention her looks - a pair of curved horns jutted out from the beast's forehead, a black pentagram emblazoned between them. Her eyes smouldered, a dark tongue peeking out from between pointed fangs.

Her gaze was so enthralling that it took a few moments for Jake to realise she was naked - not just that, but excessively well-endowed. Her breasts were enormous, round and weighty, adorned with large nipples the same dark hue as her tongue. But the young stallion's gaze was drawn further down her body, to the colossal penis draped over one thigh. Even on her hulking frame it was monstrous, almost as long as Jake's leg and much thicker. It was joined by two pendulous testicles, nestled in a fuzz of pubic fur. As he stared at that cock, he saw it throb lazily.

"As you can see, morsel, the only one whose will matters around here, is me." She gave a proud chuckle.

Jake opened his mouth to protest, but he couldn't find the words. Or the willpower, for that matter - with every breath he took in, he felt himself being drawn to her more intensely. The mist billowed off her fur and flesh in a thick, raunchy haze of musk, some kind of demonic pheromones that seeped into the boy's skin. He was already unbuttoning his jeans with a shaky hand.

"But why...you, uh, you look just like..." he said, the humid breeze making him wobble where he stood.

"Oh, this?" She stroked one hand over her voluptuous thigh. "Well, you summoned me from the digital world, little toy. Not to mention the amusing things I saw in your search history when you made that connection with me." She grinned widely, the sight of her ferocious teeth making Jake shudder. "And now that you've freed me, I think a little reward is in order." She moved up onto her knees, still a few inches taller than him. Her sack drooped heavily between those powerful thighs, radiating enough heat that Jake could see the air quiver above her crotch.

"So, you're some kind of..." Jake groped for the word, his mind a musk-drunk fog. "Succubus?" He was naked now, his own sizeable length twitching in the dank air. Of course, compared to the colossus before him, it was puny.

The demon smirked, shaking her head. "A succubus? Oh, no, boy," she dragged that slimy tongue across her teeth. "I am so, so much worse."

And as those last words echoed in Jake's head, he fell to his knees. He felt the eerie glow around him and, with what sense he had left, realised he had crossed the threshold. He was knelt within the boundary of the summoning circle, and the monster he had summoned now loomed over him, threatened him, enticed him. With a queasy fear in his gut, he cast his eyes up to meet her burning gaze. There was one hope left: to speak a demon's true name...

"What...what should I call you? If I am to, uh, serve you?"

The Rena-demon rolled her eyes. "Call me whatever you want, it's not like you'll be able to talk too well." And she bucked her hips, letting that enormous cock flop forward, its foreskinned tip slapping against Jake's face with a meaty smack. His eyelids fluttered as its heat washed over him, and she grinned. He was hers.

The young stallion may not have been the most experienced guy when it came to sex, but he knew how to suck cock. A side effect from being limber and well-endowed, and one he put to good use now. He kissed over the fat, dark tip of the demon's meat, its surface temperature warming his lips. Jake's hands were no longer shaking, and as he moved them to stroke at the monster's uncut shaft, he realised with a whimper that he was unable to fit both hands around its girth. He settled for squeezing, pulling back the thick, fleshy foreskin. The full, meaty bulk of the Rena-demon's cockhead was revealed, and Jake was rewarded with another thick cloud of musk, which wafted into the air, and directly into his snout.  His eyes were watering by now, but so was his mouth: he let his jaws open up to take in the tip of that cock. It took some effort on his part; the sheer thickness of it meant that he had to use both hands to cram it into his mouth.

Intense, musky flavours washed over Jake's tongue as his jaws strained around that monstrous cock. True to her scent, his palate was assaulted with thick waves of raunchy, grimy pheromones, but with an added layer of acrid, bitter sourness. It made him wince, but by that point he was already hooked. He swallowed hard, and was surprised to feel that cock tugged deeper, sinking into his throat. At this, the boy gagged loudly, wincing and spluttering around that hot schlong, but at the same time he couldn't dislodge it. In fact, despite the discomfort and the uncanny stretch, he found himself gulping it deeper.

"That's it, you little morsel. I forgot how good it feels to have a tight throat gagging on it!" Her nuts swung pendulously as she rolled her hips, squeezing another inch into James's maw. "You like it, don't you, boy? It's obvious, seeing you worship your mistress with every inch of that throat!" She grunted, fingers curling through Jake's mane and forcing him to take almost half of that enormous shaft down his throat. He could feel his neck bulging with its girth, and a powerful, infernal throbbing that warmed his gullet. With his lips stretched out around the middle of the Rena-demon's shaft, he could feel every contour of its surface. The thick meat, the pulsing vein as thick as Jake's thumb. The heat rose from it and started spilling down his gullet.

A contented, dreamy sigh from the demon sent another shiver through Jake's body, and he found himself swallowing, peristalsis dragging inch after inch of her meat into his gullet. With another brutal shove, his face was buried in the thick, grimy fluff of her pubes. The horseboy was impaled on her schlong, the meat bloating out his neck obscenely as it snaked down and down, the tip of it squashing through into his stomach itself. The heat of her juices was near scalding, as precum drizzled out in copious gluts. Jake couldn't feel much more than the hot surge of fluid down her cock's underbelly, and the resulting bloated sensation in his stomach. As he gagged again, he felt his belly slosh.

The demon lingered there for a short while, Jake's throat and jaws twitching around her cock, inadvertently milking her. There was a lurch in the young stallion's gullet as she pulled her hips back, gradually dragging that oversized cock back out of his stomach, back up his throat, and eventually out of his mouth. It was caked in thick, slimy ropes of drool which slopped down Jake's chin and onto the chalk-stained carpet below. He took in deep, desperate gulps of air, trying to clear the gluey mess from the back of his throat; after a few attempts he managed to burp up an off-white slurry. Finally able to breathe, he found his eyes rolling back in his head as he collapsed, panting, onto his back.

It was only moments before he felt a heavy thump against the carpet, and strong hands gripping his knees, tugging his legs apart. Jake let out a gurgle of protest, but he couldn't deny the rush of anticipation. He was overwhelmed: the fluid slopping around inside him; the thick miasma of her scent; the fear welling up in him as her cock nudged against his inner thigh... "Oh, no, oh fuck..."

The renademon's dick, slick and steaming, prodded against the equine's rear. It lifted up Jake's leathery, drooping nuts, revealing the dark pout of his anus. She teased at it, rubbing the greasy tip of her meat around its puffy flesh. The boy was mumbling something, but with the mesmeric effects of her musk working their dark magic, it was hard for him to form actual words. The few snippets she caught - "gentle", "break me", "too much" - made the demon growl eagerly. With a grunt, and a buck of her hips, thrust her cock deep into him.

Jake let out a loud whinny of surprise as her cock squeezed up into his arse. He had expected pain, or worse, but he was saved by some combination of the demon's influence and the thick slime in which he had coated her shaft. The stretch was still there, though: the uncanny, visceral strain as his soft hole was gaped obscenely around her girth made him clench his teeth. He was no stranger to anal sex - his ex's strap-on had been more than educational - but this woman's cock was far bigger than he could ever dream of taking. And it drove deeper, plunging into his innards, each thrust evoking a dull, queasy ache from his guts as her infernal meat rearranged and straightened out his intestines around its bulk.

As she fucked her young quarry, the demon let go of one of his ankles, and rested it against a smooth surface in mid-air. The edge of the magic circle threw up invisible walls that kept her inside, but also worked as leverage for her, allowing her to shift her weight, lift the boy up by his ankle, and drill him deeper still. Her shaft disappeared and reappeared, sinking inches at a time into his once-tight rear. Jake's own cock and balls flopped and jostled around against his belly, precum drizzling over his bloated, churning stomach.

With her considerable weight behind each thrust, the stallion was almost folded in half. He gripped onto the carpet with both hands for support, grunting with pleasure and discomfort. By now her entire length was plunging into him, her enormous balls bouncing against his buttocks with enough force to bruise. His stomach started to swell again, hot juices gushing up through his brutalised intestines and adding to the sloppy meal she had already fed him. Somewhere in the haze of musk and meat and powerful, relentless fucking, he climaxed, spraying his stomach and face with hot ropes of equine spunk. But it was miniscule compared to the punishment, the reward she was putting him through. It was all Jake could do to withstand the punishing slap of her hips, the gut-churning assault of her cock.

This time, the demon's orgasm came quickly and explosively. Her entire body seemed to ripple with pleasure and potency, her muscular thighs shuddering as she drove that meat into him a final time. Its veins pulsed fatly against his insides, its underbelly bloating up with the rush of thick, sludgy spunk before geysering into the sticky, squirming boy. This time she could hear her seed filling him up, gurgling into his stomach and causing it to sag under its new heaviness. Jake had looked slightly pregnant from her throat-fucking; now he looked like he was burdened with triplets, and a month overdue!

An ominous rumble echoed out from the renademon's stomach as the last gushes of her load poured into Jake. He whimpered and gagged suddenly, before burping up a hot, viscous glut of demonic cum. The flavours made his eyes water, raunchy and bitter and metallic. In his fuck-drunk haze, he swore he could feel the individual sperm within the gunk, frothing up from his throat in great spluttering mouthfuls. He gasped loudly between each slimy gag, until he managed to hold back the flow. His stomach was still achingly swollen, but he had belched a thick, wide puddle of her molten seed onto the carpet outside the circle.

The cock left Jake's rear with a wet, sonorous squelch, followed by a steaming mess of spunk from the boy's battered guts. The demon's muzzle twisted into a toothy smirk as she looked down at the wreckage of the equine's hole. It was gaped grotesquely, a glistening tunnel filled to overflowing with her unnaturally viscous seed. His anus itself, already plump and soft from the stallion's biology, had been warped into a glistening rafflesia-bloom of slimy, twitching meat. Ruined, to put it mildly.

"You've had more than enough attention now, boy. It's my turn."

Jake faded back into consciousness as he heard the demon's voice. Craning his neck and propping himself up on sore elbows, he saw her standing in the centre of the circle, with her back to him. His her ankles and thick, muscular calves, up the back of her wide thighs, only to stop at her rear. It was a sight to behold: her fluffy tail was hiked up to reveal the full expanse of her thick buttocks, covered in dark red fuzz that glistened with sweat. There was a faint pattern of darker grey towards the middle of her rump, wide and heart-shaped. The main focus, though, was right in the centre: the renademon's anus was protruding out from between those cheeks, a wide, puffy ring of meat. It twitched and wrinkled as Jake watched it, the flesh so dark it was almost black, highlighted with a sheen of grease. With a queasy ache in the pit of his stomach, the stallion realised it was the most beautiful thing he had ever seen.

"Well? Don't keep a girl waiting, now." She was glancing over her shoulder at him, an ominous glint in her eye.

His legs felt like they were made of lead as he stumbled up onto his knees, stomach sloshing gravid in front of him. As he shuffled forwards, Jake reached a shaking hand down behind himself, under his tail, to feel what had become of his hole. His fingers stroked fearfully over the crater of steaming, slimy flesh, and he let out a whimper. The uncanny, visceral sensation was enough to make the equine shudder, but his stomach shook as well, a loud squelch echoing from inside it. He grunted suddenly as a hot splatter of seed sprayed out of him, slopping down his thighs and further ruining the carpet. His cheeks burned with shame as his bowels emptied another gallon of the demon's spunk onto the floor, but when he looked up to meet her gaze, she was wearing a prideful grin.

"Damn, you mortals are sloppy! And in such a sexy way," she chuckled. She shook her rump from side to side, watching the horse's eyes following its jiggling motion. "Almost makes me regret what's coming next." She reached back and grabbing Jake by his mane, pulling his face up under her tail and squashing her plump hole against his muzzle. The boy started licking feverishly, as much out of a sense of duty as his own surging lust for the renademon's arse. The flavours burned into his tongue: dank and raunchy, with a hint of rare steak, drizzled with sour, salty sweat. Jake licked and slobbered so eagerly, with such hunger, that he didn't notice that his muzzle was sinking into the monster's hole. Not until it was too late, that is.

When he felt the firm tug of her anus around his muzzle, Jake whinnied in surprise and fear. The musky heat of her rectum was already close to engulfing his entire head, and even though he started to push and shove back against her thick, cushy buttocks, his arms were too weak to prise himself away. Any words of protest he might have uttered were lost inside the demon's body. He could only squeeze his eyes tightly and feel the gooey warmth spreading over his head.

Soon enough, the renademon's hole squelched down over Jake's head and neck, plunging him into darkness. He could feel himself travelling now, inch by inch up into the smouldering depths of her guts. With his arms now limp at his sides, the equine was easy prey for the monstrous creature. His head was swimming with musk and fear, echoing with the grotesque sounds of her innards. Squelches, gurgles and deep rumbles beckoned him closer, and despite the disgust and the fright surging through Jake's mind, he found himself pushing deeper, wriggling more of himself into the greasy darkness. His arms and torso slipped past the clenching, rippling portal of her ring, and he shuddered as his cock slid over the squashy, greasy threshold. His legs were limp and exhausted by the time they were lifted off the carpet, pulled hungrily into the ravenous squelch of her bowels. It wasn't long before the sweltering heat and the lack of air overcame the young stallion, though. His last thoughts before he lost consciousness were a hazy jumble of need, gratitude, and pleasure.

As her prey slipped out of sight, his hooves disappearing forever through the hellmouth of her anus, the demon slumped down on the soggy carpet. The magic circle still bound her, but she was full and satisfied, for now. There would be more worshippers, more victims, and freedom: that, she would make sure of. But for the time being, she lounged across the expanse of the chalk circle, hands playing over her distended belly. Her stomach's gurgles sang her into a luxurious nap.