"Senpai, are you seeing the same thing that I see," Sakura Matou asked her beloved Senpai as she stared at the purple portal? That had manifested in her Senpai's back yard.
"I am Sakura, I clearly am," Shirou responded, as he was, seeing the same thing his Kouhai was currently looking at. "And it looks like a purple portal?"
"What should we do?" Sakura asked, she knew the best thing to do was clearly to go and get her sis- Tohsaka-Senpai as she could tell that the purple thing Senpai's backyard was clearly magical in nature.
"I think we should go and get an adult or something," Shirou replied as he turned away from the clearly magical portal that had appeared in his backyard. Hadn't his father mentioned something about a Second Owner or something like that once?
"Senpai!" Shirou heard Sakura shout, and he immediately turned around to see that a purple tendril had extended from the purple portal and wrapped itself around her body.
"Sakura!" Shirou shouted as he tried to run over to her, but he was stopped as a tendril wrapped around him as well, and then the two of them were dragged into the purple portal.
And Shirou felt himself passing out.
And then he woke up within the opening of a cave with no portal to be seen, and neither was Sakura. "Sakura, Sakura!" Shirou shouted into the air though there was no response. "Dammit! Where the hell am I?" Shirou cursed as he looked around the forestry area he had been transported. "I guess I should go look around and try to find Sakura?" Shirou said as he exited the mouth of the cave.
Xxx
Two weeks had passed since Shirou had entered the land of Mareth, he had managed to learn the name of the place from Whitney one of the few people in this place that was not immediately hostile towards him, or attempted to rape him. Yes, rape him for Mareth was a place of sexual debauchery that was way more visceral than any porn mag that Shinji had given him.
And it was something he had experienced on his first day in this world where Shirou had been exploring the forest that was right outside the cave he had woken up in.
He had been walking through the forest trying to find Sakura and looking for supplies when he had been assaulted by a Tentacle monster, yes an actual Tentacle monster. That had proceeded to violates his body. It has removed his pants where one of its tentacles was seemingly a fleshlight that had inserted his dick into itself, after it had made him erect by taking his anal virginity with another and stimulated his prostate while another had filled his mouth and pumped aphrodisiacs into his body. And so for what felt like an hour, it had milked his cock of more cum than he had ever cum before and filled him up with its own fluids. Leaving Shirou a sticky mess on the forest floor. And what made it all worse was that Shirou had started to get really into due to lust filing his mind he had almost been sad then the beast had pulled out its Tentacle from his well fucked ass.
Though he had quickly come to his senses after that, though thankfully during his time here he had managed to avoid on accident one of the more sinister aspects of the food in Mareth and that is that it could transform your body. Which he had managed to not get to happen to him as he had been cooking the food properly thanks to the fire he had created. Which had been explained to him by Whitney the dog morph that ran a farm in the plains, a place he had found after exploring the place more. And doing that Shirou had also discovered that space worked differently in Mareth, and that if you knew a place you could get there much quicker.
Though the defeat he had suffered at the vines of the tentacle monster hadn't been the only ones, he had suffered here on Mareth. No, before he had learnt to masturbate to alleviate his lustful feelings. He had been overwhelmed by that emotion due to the monsters using spells or potions that made him very horny. Such had been an encounter with two imps the next.
Where they had made Shirou too horny to fight and so the two well-hung monster cocks into his mouth, and ass like the Tentacle best had done. And Shirou sadly remembered moaning like a bitch in heat as they thrusted their cocks into his two whole and cam buck loads of fat cum that had leaked out his ass for the rest of the day.
The other one had been with a goblin a race of short green women with massive breasts that were constantly horny and in search of men that could impregnate them. And Shirou had lost to one, and he had fucked her like a wild beast as she had made him drink something called a fuck draft, that had made him too horny to thing. And so he had filled her womb up with deciliters of cum.
And impregnated he had run in her a few days later with a very pregnant belly where he had willingly fucked her in the ass to alleviate his lust. Where she had introduced herself as Tamani.
Though after that encounter Shirou had only lost one more time against a tiger dude named Akabal that he had violated Shirou's ass with his fat cat dong.
And that had been thanks to the beautiful sword that he had found in a tree that had allowed him to fight against the corrupt monsters of Mareth.
And right now Shirou was wandering through the desert area trying to find a city protected from the demons that had corrupted the land. Where he could sell all the items, he had accumulated over the last two weeks, and to gain proper armour to protect himself while he continued his search for Sakura. And he couldn't even imagine what his precious kouhai was going through if his experiences were anything to go by.
Though sadly in his search for the city of Telaldre, Shirou had gotten into a fight with Sandtrap that had destroyed his water sachel. Which meant under the blazing sun Shirou only had various potions and tonics to drink to avoid heatstroke.
Shirou knew from Rathazul, a rat morph that these could change his various ways, but he didn't want to die of dehydration while he wandered the desert as Shirou needed to find the city so he could get to it quicker the next time and avoid a situation like this again.
So Shirou popped open the one he thought would have the least amount of effect on his person.
And so from his large sack, Shirou pulled out a flask that had the label Equinium on it.
Shirou pulled the cork of the bottle and he dranks some heavy sips of it.
"Strange taste, kinda like the root beer Fuji-nee," Shirou said to himself, but he stopped as he let out a groan as he felt a heat in his pants and could feel his lust rising a bit.
Shirou groaned as he unzipped his pants and pulled it and his underwear out, making his cock out that quickly went erect, and he quickly wrapped his hand around the thing and started to masturbate to relieve himself. Though as he stroked his cock Shirou could feel cock becoming even thicker than before, and he could even see it lengthen as he stroked the now much more sensitive fuck tool. And Shirou finally came as his cock had finally finished changing, his now much thicker and larger cum load splatter against the desert sand.
"So that is what it does," Shirou said as he stared at his still erect penis that was now a twelve-inch horsecock instead of his six-inch human one. Yeah, he could definitely tell why they people just consumed stuff like this if it did this, yeah it was very much something he could see people get addicted too. And not just because of the pleasure but also the strength as Shirou could feel that he was much tougher and stronger than before. "I am going to have to be very careful, but I can also see how this can be a necessity," he said, as he stared at the half-empty bottle.
Xxx
"I didn't think it would escalate to this level," Shirou said as he looked down at his further transformed body which he had acquired three days ago. It had been a bit of an accident, he had been helping Rathazul with a potion that involved Minotaur Blood and Equinium. The stuff that he had drunk during the desert which he had stopped drinking until he found Telaldre had in the end given him a twenty-horse cock a fat pair of nuts that overflowed in his hands, a horsetail and hooves instead of feet.
And with that Shirou had also gotten his first introductions to Minotaurs, and he instantly hated the beasts. And he hoped that Sakura had not run into those things.
But what had happened to Shirou was that Rathazul had been making his potion, but then a group of imps had ambushed they managed to push Shirou into the mixture, and he accidentally swallowed the stuff.
Which had resulted in his current transformation? His lower body had changed into that of a horse, yes he was a centaur now. One with now two massive horse cock that was throbbing erectly beneath his horse half. Though because of that Shirou couldn't properly jerk his now dual cocks off. Which he meant he needed assistance to get off, though the goblins of the forest especially Tamani and her daughters. Who were also his daughters but Shirou had ceased complaining when they had swallowed his cockheads with their mouths and pussies. And after that, they had decided to move in with Shirou in the cave he had made his home in this sexual world. And because of that Shirou got first seat viewing of their bellies swelling with babies he had put in them, which Shirou found rather hot. Though he attributed it to the realm changing his view of what was the sexy and morality as well, because he would not have found sex with someone related to him by blood sexy, but now he couldn't help but fill his two daughters with his horsecocks.
God his life had become so much more perverted.
Right now though Shirou was walking through the mountains trying to find the entrance to a Demonic Factory he had heard rumours about that said they took people they found to. He both hopped that Sakura was and was not there.
Though his search was interrupted when he was attacked by a pair of bigger than normal imps, and Shirou sadly lost as he didn't take in account a brand new weak spot in the form of his giant equine ass. As one of the imps had mounted his behind and thrusted his large canine cock into Shirou's ass. Knot and all and so he was quickly on the ground moaning as his butt was filled with hot demonic cum while the other one just used his mouth, though he decided to have some moar fun by pouring a bottle of Probova down Shirou's throat which resulted in him gaining two large pairs of lactating breasts the imp quickly used to pleasure himself with. While just below his currently getting fucked asshole a brand new pussy formed, though he would only find that out after Tamani commented on his new herm status.
xxx
"I wonder if drinking more Equinium will make then go away?" Shirou asked himself as he held up the bottle of horse essence as it were.
"Don't know myself, but nothing ventured nothing gained as they say," Tamani said as stood behind Shirou. "Though I think you should keep it makes you so much sexier and even breedable Shirou," Tamani said as she patted the wet pussy, which caused Shirou to moan in response causing it to get wetter.
"Yeah, father it and your breasts are great, and we would like to continue having your milk," Shirou's goblin daughters said at the same time smack their lips as they had just finished emptying his lactating breasts which had been a pleasurable experience as they had emptied each of the four breasts that the young transformed teen now sported on his chest. Which also had the effect of making it very hard for Shirou to think of himself as he instead of a she.
"That is what I would like to not have happen to me," Shirou said as he swallowed the tonic and he immediately knew that it did not have its desired effect.
As Shirou felt her cunt get more voluminous and deeper as it prepared itself to get filled by big fat centaur cock and at the same time her mind was assaulted with images of her being mounted, breed and then giving birth to creatures that happily fucked her pregnant again after being born, while she also breeds various mares with her twin cocks. Who then gave girth to small sluts that wanted the same, to be filled with daddies cock.
"Oh," Shirou moaned as the various image vanished from her mind and she felt her cock oozing with pre-cum and her pussy leaking juices onto her fat testicled which Tamani was now happily licking up. "My Shirou it seems that it caused you to go into heat and run, now what was it you said about not wanting to happen to you?" The goblin asked, and Shirou could only sigh in response as she could guess what awaited her.
And Shirou was right as not even a day later her spanking new pussy was fucked by a huge cock and flooded with fertile semed that assaulted her now very, very fertile womb. And the one that got to do the deed was Kelt. The centaur that worked for Whitney, who did a lot of humiliating things to Shirou so that she might get a bow from him. And that day she had gone to him for the final lesson, where he afterwards had mounted her and fucked Shirou into the ground ending in the male centaur putting a foal in her mare womb. Ending her heat soon after, though she then had to deal with a baby growing in her womb for two weeks who had after being born and draining her breasts took a page out of his father's book, and throat fucked her sleepy form.
After that, Shirou took the necessary measures to become male again thanks to a few special eggs Tamani had found for him. Which Shirou had appreciated, he had initially hated the goblin for raping him, but she turned out to be kind of a good friend when she wasn't drowning herself on his horsecocks and spewing out his children, who had increased in numbers by a lot.
During his stint as a pregnant futanari centaur, Shirou had discovered the entrance to the Demon Factory he was looking for.
Xxx
Sakura moaned as she sat in her spot, a spot she had been stuck in since she had been captured by those creatures after she had woken up, after she and her Senpai had been dragged through the purple portal.
Though before that, the demons, as that was what they were called had raped and violated her body for numerous hours and continued to do so when the mood struck filled her womb and forcing it to give birth to an imp. They had also made Sakura swallow various stuff that changed her body that made her look more like the demons that ran the place. They had also massively increased the size of her breasts, making them the size of her body, and also into two milk machines. That had been milked over since, and a massive cock that was also being milked by a machine. And had been since Sakura had been put into this system of being feed fluids that kept her alive and kept cumming and producing milk they could harvest. With her body producing exponentially more fluid than it consumed.
And the only reason she had yet to breaks was that Sakura kept hoping that her Senpai would save her, save this even more disgusting body of hers.
That was now only good for breeding and milking, but still, Sakura hoped that her Senpai would find and save her.
And that day was today, as her Senpai had fought his way into the factory and saved her. Coming in like he was a knight on his white horse. Which had been kinda literal as her Senpai had managed to become a centaur with two massive horsecocks that had been throbbing with desire when he had dismantled the setup she had been kept in. Oh, how her pussy had heated up out of the desire to be filled by those majestic things.
And so her Senpai had carried her out of that hell hole on his equine back dodging through the various demons who tried to stop him by throwing various potions at him. With that had looked very dangerous to get hit by as she had seen an imp get in the face and within second had turned into a multi breasted bimbo.
Though the escape had been a little more difficult due to Sakura's massive endowments so while she rode upon her Senpai's back two feet of demonic cock was laid against his back and spewing pre-cum straight onto his head.
Though it was finally when they had left the mountains and found a safe place to rest in the forest did the two separated friends get a look at each other. And Sakura found her transformed Senpai to be a handsome centaur whose cocks she just wanted to suck on bring relief to.
And Shirou found the succubus-fied Sakura to be sex incarnate he wanted to suckle on her fat tits, and feel that huge cock inside of his ass. And while he wished it hadn't happened to her, he knew that he would continue to care about her even if she became a full demon.
Though first the two of them had to deal with all of the build-up lust inside of their bodies.
And Sakura was already indulging in it, as she had only managed a brief respite from her sinful body for a brief few moments before the needs of her oversexed body demanded her attention. "Ah!" Sakura moaned as she began to alleviate the pressure that was in her breasts, milking the cock sized nippled her enormous chest sported.
And Shirou knew he had to help Sakura immediately, and before she could object. Shirou kneeled down and took a nipple into his mouth and began to empty them out.
But the milk that Sakura produced was special as her breasts had been modified by the demons, and so carried Succubi Milk properties, and so as he drank Shirou's chest began to swell with four bumps as the nipples of the below pair still remained
And then she finished her four tits had regrown beyond even their previous size, but Sakura's breasts had been taken care of which left her pre-cum spewing cock. Which Shirou now a had new tool to take care of.
And Sakura entered heaven as her cock felt the warm walls of her Senpai's newly formed pussy, which demanded to be breed and so she did.
And after that, the two herms continued to fuck and breed each other, until they and their newly made lewd family finally managed to defeat the demons and find a way home.
But that is a story for another day.