There were many tales about Oboro, the wandering maiden with no memory of who she was and a dark katana that was said to be so sharp it could cut the soul from a person while leaving the body unmarked. Everywhere she went, danger was drawn to her, only to be cut down in an instant. It would not be inaccurate to say that she had no equal to her skill with the blade.

Ironically, had she not been so skilled, the circumstances for her doom never would have come.

As she stared into the darkness of the cave before her, she remembered the story of the spirit who had led her here.

The ghost used to be a shrine maiden named Tsukishiro Shizuka. She, her husband and their twin daughter Kikua and Ouka had lived together in a quiet but decently sized community, until an oni named Meiouki invaded. He arrived in their midst by possessing her husband, consuming his soul and morphing his body into a more suitable form for a monster such as himself. Then the demon unleashed a horde of youma from his lair in a corrupted temple in the island mountains. Shizuka and her daughters did their best to fight back the many tentacle and bug youma, but in the end the village was destroyed, and all its inhabitants held hostage by Meiouki. The oni gave Shizuka his ultimatum: The men and children would be spared if Shizuka offered herself and his daughters to him.

The spirit was hesitant to admit to Oboro that she complied.

Then Shizuka's ghost told Oboro how the oni and his youma used her, the village girls and her daughters as his sex slaves for the past year. How they were violated and forced to birth countless fiendish offspring for their captors. The breeding only stopped for a woman when their body was too ruined to bear more children, at which point they would be eaten, often by their own offspring. Meiouki kept Shizuka and her daughters as his personal concubines, and when he wasn't impaling their holes on his massive double dicks, he forced them to use their spiritual powers to heal the other women so they could continue breeding more bugs. Shizuka was unable to bear what was happening to her family, so she imbued her own daughters with every bit of life essence she could muster, making them immortal so they might survive until they could escape. In the process, Shizuka's body became too weak to use her spirit powers. Meiouki, seeing no further use for her, devoured her alive. Only the shrine maiden's considerable power allowed her to remain as a spirit, aimlessly wandering the demon's lair until her daughters escaped on their own, revealing a way out for her as well. While her daughters sought a place to hone their skills to prepare for their own confrontation with Meiouki, Shizuka chose to find a wielder of a Muramasa blade, for only such a person would be able to "resolve the plight of the oni's lair", as she put it.

When Oboro questioned why Shizuka didn't remain with her daughters as a guide, the shrine maiden said that time was of the essence. Without her healing magic, it would only be a matter of a few more months before the other women in Meiouki's lair would be fucked to death.

Remembering the stakes of her current task, Oboro walked into the darkness, her heart filled with resolve, eager for battle with her blade.

...

'Ugh, how utterly repulsive,' Oboro thought as she advanced deeper into the demon's lair. She wished she had brought something to cover her face on account of the foul odor wafting through the cavern. It was sour and pungent, like mountains of spoiled fish. The fair warrior felt like she'd have to bathe for weeks to feel clean again after this mission was done.

Soon, the stone of the cavern tunnel gave way to layers of moss-like meat, walls pulsing and the floor squishing underfoot. Oboro grimaced in disgust at the sight. Flesh tunnels like these were an encroachment of hell into the material plane. Powerful demons would manifest these places like these for any number of reasons, the most common of which was to draw an endless number of lesser demonic entities to themselves to attack their enemies.

And speak of the devils...

"Nooooo! It's breaking meeee!"

"Please, sobs, no more eggs, I don't wanna be pregnant anymore"

"Someone...kill me...I can feel the worms in my belly squirming around..."

Everywhere Oboro looked she saw youma raping women, mostly in groups of two or three sharing one victim. Many of the women had obscenely swollen breasts, a common modification applied by perverted demons. 'These must be the survivors from Shizuka's village' she thought, both amazed that women were still alive after a year and utterly horrified to see what had become of them in that time.

A girl with short brown hair had two giant centipedes coiled around her, humping away at her rear end. Her dead-eyed expression suggested a mind checked out from reality, coping with the horror of her situation by disassociating from it entirely. The two bugs climaxed into their shared fuckdoll, an overflow of pus-colored fluid splashing out of whatever holes were currently being abused.

The next woman, with her white hair still kept in a ponytail, was much more enthusiastic about her violation as she was spit-roasted between two slugs who reared up to thrust their dicks into her mouth and pussy. The size of the cocks was made clear by one bulging out her throat, because the one in her pussy was obscured by her bloated belly, the ripples moving across the surface of the stretched skin revealing the large quantity of slug babies the eager woman was currently the host for.

Another pregnant woman with unkempt pink hair and oversized breasts only had a single youma's attention, but it was little mercy when said youma was truly gigantic; a flower whose vines held their victim above its maw to sodomize her with a gigantic cock tendril. With each deep thrust into her asshole, a bulge pushed out from her round belly. It wasn't just for the youma's sexual pleasure either; the rough ass-fucking caused the youma larva in her womb to birth themselves, only to fall into the flower youma's throat.

'These creatures truly have no limits on their immorality' Oboro observed, unable to bear anymore of the nightmare around her after witnessing the last fiend's combined act of rape and cannibalism. She realized that after so long, all of these women were likely beyond saving. Their minds would never be able to purge the horrors and depravity they had experienced, and their bodies would be unable to return to what they were before countless youma had abused them without end.

All that was left was confronting the monster that did such unspeakable things to them. "Damn you Meiouki, show yourself, so that I might return you to the underworld with my blade!" shouted Oboro, angrier than she had ever been before.

Almost too angry to notice the tentacle lunging at her from behind, which she barely dodged and cleaved with her sword. Oboro turned to face the limb's source, and saw the demon she had been seeking: Meiouki, a blue oni with a white skull face, wild hair, a pair of horns on his forehead (one long, one broken), and a too-large tongue lolling out the side of his mouth.

"My my, and I thought you were the stoic type." The voiced echoed around the chamber and was easily heard even with the carnal cacophony still going one. Surrounding him were more tentacles like the one that had tried to sneak up on Oboro. They all lunged forward in quick succession, hoping perhaps to overwhelm her with sheer numbers. Instead all it accomplished was giving Oboro the chance to split the ends of their tendrils in one well-aimed swoop. The tentacle youma writhed in pain before collapsing, leaving Meiouki standing amidst a pile of flaccid corpses.

Seemingly unbothered by the failure of his first strike, the demon continued to ridicule Oboro, "To think that one could show such fury towards such natural impulses," the demon said, pulling out a sword of his own, one that radiated a dark energy that Oboro found oddly familiar. knowing that Oboro would only become more incensed about the oni's uncaring attitude toward his victims.

"You would call any of this natural. THIS?!" Oboro lashed out, gesturing at the surrounding rape orgy. The oni casually repiled, "Is this not what all humans seek, to mate and bear offspring? I have given the women here a chance to indulge in that impulse without restriction!" Meiouki dashed forward as he spoke, swinging his blade for Oboro's side.

"Yes, no restriction," said Oboro coldly, while nonchalantly blocking the demon's blow, "until their bodies are made useless after unending violation. Then they're nothing but food for you!" At that moment, the swordswoman charged forwards, delivering a flurry of strikes to break Meiouki's stance. The demon held out, but only just. His skill with the blade was clearly wanting, and only his demonic strength was allowing him to hold off his opponent for as long as he had.

Oboro readied herself for her attack. "I may not be able to heal your victims, but I can bring them peace by taking your head, and make sure Shizuka's spirit banishes you for good!"

Meiouki's chuckled, even as he was winded by the effort of blocking Oboro's blitz. "So you have brought the shrine maiden's ghost with you"

"Yes," said Oboro, pointing her sword at the oni in front of her, "you sound awfully pleased for someone on the verge of defeat"

"I think you misunderstand." Meiouki responded. "You were not brought here to avenge Shizuka's death,"

"...What-" was all Oboro was able to say in confusion before she felt a strike from behind that hit within her very soul. Oboro's limbs stopped listening to her, and her body fell over into several tentacles that grabbed her as she began to lose consciousness, hearing Meiouki's last words before she passed out.

"You were brought here to reverse it."

...

When Oboro became aware again, she realized the severity of her situation. She could feel the slime of the tentacles coiled around her naked body, one around her midsection and more holding her limbs. Even worse, two tentacles had spread her nipples open to violate her breasts. She watched helplessly as a series of gooey bulges travelled down the length of the tendrils, each injection of warm fluid causing her boobs to enlarge even further. Meanwhile, another thick tentacle was travelling up her asshole, dutifully consuming every bit of waste it found going up Oboro's intestines. All the more space for new youma to be incubated.

It would only be a matter of time before she was youma-birthing seedbed, just like the other captive women. Oboro could only droop her head in shame at what had become of herself. "I was...hit in the soul..." the bound swordswoman lamented as she tried to ignore that she was feeling pleasure from the tentacles drilling her breasts and cleaning out her shitter. She lifted her head when she heard someone entering the room. Very quickly, her expression changed from despair to cold anger when she saw who her guests were. As if on cue, the tentacles pulled out of her breasts and anus, remaining slightly gaped from their long penetration.

"... If only I had struck down the first demon from this lair I had met."

Standing before Oboro were Meiouki and Shizuka (well, "standing" as much as a disembodied spirit can). The oni looked the same as ever, his skull face stuck in a permanent smile. Shizuka was much different. Where before the spirit had been a vague shape with a downcast face, now she looked much more like the sultry mistress she was. She had a massive bosom that almost fell out of loose robes, and her mischievous expression gave away how much of an act her previous sadness had been.

"Oh dear! Calling me, a demon!" The spectral shrine maiden feigned offense at Oboro's insult, "What an awful way to refer to an esteemed priestess like myself!"

"Indeed, such poor manners from a guest, Shizuka." Meouki played along with the ghost's play act. "But she will learn her place here, and come to understand there is nowhere better for her"

Oboro glowered at the oni as he boasted, "As if I would ever yield to the dregs crawling up from hell! Break my body with breeding, devour me if you please! If this is where it ends for me, I'll know I took more fiends down than you'll ever get me to birth!"

Meiouki was unphased by the swordswoman's declaration. "You sound a lot like Shizuka did at first. I had much to teach her."

"Oh yes," The female apparition floated towards Meiouki, embracing him from behind and making if appear as if her chest was squished into his back, "My master taught me so many ways my body could be pleasured and bring pleasure to others. If only the human body could withstand everything demons could offer..."

Oboro could only stare in horror as Shizuka not only recounted how much she enjoyed being an oni's cocksleeve, but how much pleasure she gained from helping that oni rape her own children and neighbors.

Eventually Oboro had enough. "Stop! Don't make me hear more of this! What is the point?!"

"The point," Meiouki interjected, as he had waited for his own chance to monologue, "Was that Shizuka couldn't imagine a form of existence more ideal for a woman than serving as demon seedbeds. So she decided to perform a ritual to make herself and her daughters immortal so they could be my slaves forever. While I appreciated her zeal..."

Meiouki gestured at the spirit of the Shizuka, who looked rather sheepish about the result of her impulsive decision, "...The results speak for themselves."

"Indeed," Shizuka nodded in agreement, "I got carried away in my passion, and my daughters were not as grateful as I expected. After they escaped, I did try to find them again, which was how I came to learn about you," Shizuka pointed at Oboro, "and your skill in the art of the blade."

As she spoke, two things rose from the meaty floor. The first was some kind of egg-shaped pod. The second was the sword that Meiouki had used before.

"This sword is a Muramasa. It is said to be so sharp, it could cut the soul from a body without harming the flesh." When Meiouki finished speaking the pod opened up to reveal what was inside: Shizuka's naked body, stuck inside a wall of pink meat.

Meiouki spoke up again, "The form you see before you is a slave whose flesh I have remolded into a vessel for Shizuka. But as long as that woman's soul remains inside, my priestess cannot claim the body for herself. And while I have the necessary blade, I sadly lack the skill to make the strike!"

Oboro ruefully smirked at the pettiness of the oni's ambitions. "So that's it then? You wish to gift your favorite harlot a new body, and you'll torture me with unearthly violation until I strike out the soul that already inhabits it?"

"Oh heavens no, your torment would happen regardless." Meiouki replied. He began to approach Oboro, and the tentacles holding her moved her into a horizontal position, spreading her legs wide to expose her bottom holes. "You see, my kind has a sexual technique, one that allows me to steal the spiritual essence of those I violate. Once my seed is embedded within you, I will possess your soul-deep mastery of the Muramasa!"

To Oboro's horror, two grotesque shafts emerged from a large slip in the oni's baggy pants. Each was longer and thicker than her forearms, and they were covered in pointed knobs that looked they would carve grooves into whatever surface they were dragged. Oboro began to panic and futiley wrestle against the tendrils holding her in midair, "Y-you can't do this to me!" she screamed. "Let the other youma have me first at least! If you force those into my holes now, you'll tear me apart!"

"Hmmph, every woman worries about that..." Meiouki rested the heads of his cocks at the entrance to Oboro's pussy and anus.

"...and they are absolutely correct." The demon gripped Oboro's rear and SLAMMED her down on his dual lengths in an instant.

She couldn't hear the sound of her muscles stretching too rapidly and bones snapping over her own howl of agony.

...

The screams stopped after the first half hour, when Oboro's voice finally gave out. Despite the mammoth pillars brutalizing her womb and guts, her organs had not been crushed like one would except. The orange glow visible under bulging skin explained why; Meiouki was using the raw power of Shizuka's healing magic to keep his victim's body from being torn apart on his penises.

"Muh...muh...muh..." was all Oboro was able to mutter out while she was rocked back and forth, her over-swollen breasts bouncing with each slam of the oni's cocks into her holes. Her vagina and anus were stretched beyond reason, wider than if a man had shoved both fists in.

Looming over the swordswoman's face was the smiling ghost of Tsukishiro Shizuka.

"Oh my, looks like my master can't help but go all out on you." said the ghost spirit, and Oboro couldn't disagree. Meiouki's magic might have kept her insides intact, but it wasn't stopping her guts from being slammed up into her chest with every thrust. Right now she was little more than a fuck toy, completely passive while the oni did all the work.

Shizuka could only giggle at the sight of her master going to town on his newest seedbed-to-be, "I can't help but be a little bit jealous of you right now. Oh, I can hardly wait until it's me impaled on his dicks again! Here," Shizuka reached down, her spectral hands on either side of Oboro's face, "Let me into you mind, so that I might share a look into what life is going to be like from now on..."

What Oboro saw when the ghostly fingers touched her temples was dozens of flashes of Shizuka's memories, all of the depraved things she did once she was fully turned into a depraved slut.

How she masturbated while Ouka and Kikua have a train of youma ran on them, and then slurped the demonic cream from their leaking holes.

How she used her mystical healing to enhance the transplant of demon organs into other women, making it so they'd only ever bear the children of youma and never have a human child again.

How she'd implant a special youma seed in her snatch in order to grow a penis so she could impregnate her daughters personally

(Oboro noticed that Meiouki was oddly absent from the memories.)

Shizuka, unsurprisingly, saw Oboro's memories, a somewhat monotonous montage of demons and bandits getting slain. The shrine maiden honestly wondered if there was anything else to this girl's life.

And then she saw something else.

They were foggy and fragmented, but there was another set of memories, not of a warrior named Oboro, but a young noble girl named Momohime Kagami. There were only pieces, but it was enough for Shizuka to piece together a story.

One where an entire noble family was slain for what they tried to hide from the shogun.

One where an innocent girl was possessed by a selfish warrior named Jinkuro, who sacrificed his existence to save her life by fusing his essence with her, transferring his skills in the process.

And then there was the other name rattling around in her mind in addition to Momohime and Jinkuro: Torahime

'Torahime? The phantom warrior? That Torahime?"

For the first time in a while, Shizuka was thinking about something other than her rampant lust...

Meiouki, on the other hand, was deep into his own lust. He had almost forgotten there was an actual goal he was trying to achieve, so lost was he in pounding away at the swordswoman's ass and pussy, eagerly anticipating the time when she would birth youma and his own offspring from every hole. He could see it now, another mindbroken girl screaming his name while their pregnant belly shook from all the things writhing inside. She's climax while baby oni pulled their way out of her uterus, one by one, until the prolapsed organ hung out of her vagina. Then Meiouki would watch the expression on her face when she realized her intestines were also impregnated thanks to demonic corruption, and the first of many youma clutches was shat out of her new birthing hole.

The thoughts made the oni become more frenzied, increasing the pace of of his pumping shafts. Between the cocks hollowing her fuckholes and the vision of perpetual debauchery being beamed into her mind, Oboro was at the peak of pain and pleasure. The dual sensations coming from opposite ends of her were like a vice she was being pressed in, and as she was pressed, her spirit energy began to loosen from her soul.

Meiouki sensed the energy and, eager for his sought after prize, allowed himself to reach climax.

"RRRRAAAAAAAAGGGHHHH!!" The oni bellowed, sinking his conquest all the way to the base of his cocks, and he finally ejaculated. Wave after wave of boiling hot semen rushed through Oboro's insides, filling her womb and intestines in an instant. Her belly inflated in an instant, far beyond how large it should have grown without her skin tearing open. But the cum kept coming up her guts, up her stomach, up her throat, until-

"BEEOOOUULLGGHH!" A geyser of curdled goo erupted out of Oboro's mouth, which was forced open by the strength of the jizz flood running straight though her. Eventually, the oni's orgasm ended, and the remaining liquid glopped out of the girl's slack jaw, and when he pulled his penises out of her, similarly large wads oozed from her gaping holes. Her eyes, already rolling back in her head from Meiouki's relentless bottom battering, were now completely blank.

Just like her soul.

The part of her inner self that had been a warrior had been successfully fucked loose by the oni's assault, her skills with a sword now his to wield.

The blade master Oboro was no more.

...

One week had passed.

Meiouki's plan had succeeded. With the essence of one who had perfected the art of the sword, Meiouki was able to use his cursed blade to remove the soul of the anonymous woman he had remade into the spitting image of Shizuka, whose took the vacant body for herself. The nameless woman's soul, unlike Shizuka's, lacked the strength to linger, and was dissolved by the miasma of the flesh cave.

The oni and his slave maiden stood together as they observed their handywork: The unconscious body of a girl absorbed partway into a meat wall with her bloated tits hanging out. Every now and then, wormlike youma would crawl in and out of her swollen nipples. Many were hatchlings from her latest brood, not quite ready to move on from their mother.

The girl was Oboro, or rather it used to be. Without the part of her spirit that came from Jinkuro, the memories of Momohime Kagami had returned. Where there was once defiance followed by humiliation, now there was the resigned obedience of a woman who had already dealt with an ornery swordsman stealing her body and throwing her into danger. Compared to that, and least her current master and mistress gave her pleasure and (relative) peace.

Of course, that peace was conditional, and it was a cruel one for Momohime. Shizuka had told Meiouki about Momohime's sister, Torahime, a powerful shrine maiden in her own right who had died in the coup that slaughtered the Kagami clan. However, such was her faith and spirit that she was able to rise from her grave as a specter temporarily, looking to exact vengeance for his fallen family.

Her resurrection was brief, but Shizuka reasoned if it could happen once it could happen again. With Momohime as an anchor point with her blood connection, a sufficiently strong summoning could be performed to bring Torahime's spirit back. All they would need then was another woman to remake into their preferred form and voila!, Meiouki would have a second slave maiden, one with the spirit of a warrior who could breed youma even more potent than any woman the oni had found yet.

All they would need were some summoners. And while Shizuka was only somewhat skilled in the art of summoning, her daughters were in a league of their own.

It was time for the oni lord of lust to retrieve Kikua and Ouka Tsukishiro.