Groggy from a day of socializing with his Servants, the exhausted Master stumbled into his room without making the point to turn on his light. He knew full well where his bed was after his many visits over the course of his stay with Chaldea, and exhausted as he was he was plenty content sleeping in his uniform anyways.
Of course he hadn’t the foggiest that he was walking into a trap that was, as far as the culprit had been concerned, harmless. The Berserker known by the name of Ibaraki-Douji lurked in the room’s corner, vision capable of piercing the darkness due to her oni blood waiting for the young man to step upon talisman she’d bought from the Japanese fox Caster. It was imbued with a curse that would strike fear into the heart of the one that touched it, or so she’d been told. She’d also been told it was ultimately harmless, the perfect revenge plot aimed at the man that had denied her his chocolate pudding during lunch!
The talisman in his path, it was only natural that Gudao would step upon its paper surface, a bright purple light illuminating the room as he felt electricity run through his body. At this point Ibaraki had used her shapeshifting abilities to shrink out of sight in case her Master had decided to seek a culprit, but as the electricity faded from his body and he stumbled back to hit the light switch, he was far too shocked (both literally and figuratively) to think about whether he was under attack or if it was one of his contracted Servants at work.
The young man coughed as he shambled over to his bedside, managing to sit himself down as dizzied vision slowly realigned itself. Though the shock had subsided, something still felt wrong. His body felt lighter somehow, as if it had received some sort of supercharge. The reality of the situation was that his form had been shifted from that of a ‘flesh and blood human’ to ‘a Servant’s flesh and blood body formed from magical energy and a spiritual core’.
As his vision began to fully restore itself something alarmed him. His vision had… improved? It had always been 20/20, so how much better could one’s vision get? Yet reality defied what he knew and the image of the world around him felt sharper, and he had the feeling that if more than just his door was in front of him he’d be able to see much farther. Of course he hadn’t the foggiest idea that his normally blue irises had shifted to a much more unnatural violet.
It wasn’t just his eyes that had undergone a change following contact with the talisman however. A mundane sense of smell had suddenly become one talented in distinguishing the various scents in the room, from his sheets to his own sweat to the scent of one that didn’t belong in the room. Distracted by these new sensations, Gudao didn’t notice as his nose became smaller in slight, cuter and more feminine. What he did notice was that an oni had entered his room.
And the presence of an oni nagged at the back of his mind far more than it should have.
Peeking from behind a book on the bookshelf opposite Gudao’s bed, Ibaraki watched on with interest as her Master slowly became what she assumed was something he feared more than anything. Could it be a mighty tengu? A fearsome cyclops? She was practically giddy with anticipation until the scent of her Master began to undergo a change. It was subtle at first, but she quickly began to realize why it smelled familiar. And she realized she’d made a mistake as soon as Gudao's face seemed to finish softening.
Gudao stood once more, violet eyes glancing occasionally at the bookshelf where the oni hid. It was Ibaraki, right? Whatever she’d done, it was likely she didn’t mean any real harm, but he couldn’t put aside the tightness in his chest that thinking of onikind brought him suddenly.
His face aside, it seemed his body was slowly undergoing changes of their own. A boy of average height under normal circumstance, his vantage point was suddenly rising. He was a moderately muscular for his body mass, but as arms and legs both lengthened he could feel himself getting stronger, like his body was used to running long distances and swinging heavy objects around.
His dark hair, too, seemed to be under the effect of growth as it tickled his ears and the back of his neck, quickly growing both longer and straighter as it framed his face.
Gudao knew something was terribly wrong by this point. Limbs didn’t just grow, nor did hair sprout so suddenly. As much as he was trying to ignore Ibaraki’s presence it was making him more and more agitated as well. He opened his mouth with the intention of calling his name, but instead a different word came out. “Insect”. And with that word came an unfamiliar sensation as lips rose to speak, chapped from the cold, touched once more full and soft.
The hiding oni was sure now that something had gone wrong. For some reason the talisman was transforming her Master into what she feared most, and that fear was a Servant that lived in Chaldea alongside them. ‘Insect’ was that Servant’s go-to word for describing onikind as well. Whether or not she wanted to flee, to find Shuten and that fox and look for a way to deter the transformation from going any farther, she knew it might be suicide to beeline for that door.
The young man standing before the bed was quickly beginning to look less and less like a man and more and more like a young woman as time went on. From the height increase his white jacket had already risen up his abdomen to reveal his toned stomach, which while remaining toned had begun to lose its usual shape and flatten as it widened closer to his pelvis. Thighs flared and the button on his black pants was forced open, revealing white boxers underneath that were stretched as well by ballooning thighs.
In the meantime Gudao’s mental state began to deteriorate further. “Wh-?” He had an urge to speak, yet upon doing so he didn’t recognize his own voice. It was the voice of a woman and an older woman at that, and yet while it was unfamiliar it was becoming easier to place. That was his voice, correct? The voice he called out to his ‘son’, the voice he’d used to address his ‘Master’ -- No, he was the Master. Wasn’t he?
The pressure from his expanding lower body digging into pants with a limited space began to prove too much to bear for the poor boy, and without thinking twice about it he bent over so that he could wiggle them off and drop them to his ankles. Everything down there looked foreign, and he realized he hadn’t noticed that his usual healthy skin tone had been slowly paling to the point where he barely recognized it. Curious, he ran a hand up and down his new and exposed thighs, noting how soft they were while too distracted by the heightened sensation of skin on skin to realize that his hands had quickly changed so that his fingers were more slender, nails longer and manicured.
Ibaraki’s Master seemed to be becoming aroused by his entire transformation and the culprit was becoming more and more terrified, particularly with her Master’s penis now out in the open. But that, too, was soon rectified as his arousal claimed his manhood as if it was silly putty being tucked into its container, leaving an unfamiliar feeling in his loins.
‘It isn’t proper for me to be doing this in Master’s room’. The new woman thought to herself as she brought hands up from her thighs and across her exposed stomach before settling them upon her chest. While Gudao’s self-awareness was still present, it was fighting a losing battle as she became more and more comfortable with whom she was becoming. Her new name, too, was becoming clearer and clearer, as well as the reason why she’d leave that hiding oni alone as opposed to killing the bug on the spot.
Kintoki would be upset with her.
With hands resting on her chest, she knew the belted top would not fit what was soon to come. She could feel her nipples puffing up as she tugged at the strap, and they began to poke through the white material as soft mounds pushed up soon afterwards. She freed her pink nipples and tugged the shirt off her arms just in time for the flesh beneath to begin expanding with a great deal of speed. It felt good, far better than she could have expected, and it was impossible to prevent a feminine moan (or several) from escaping her lips as she reached to cup two enormous breasts that should have belonged on her body all along. Her moment of self-indulgence was quickly interrupted however.
It seemed the moans had been loud enough to, much to Ibaraki’s relief, attract two bodies to Gudao’s room in the middle of the night. Mashu pushed through the door first screaming for her ‘senpai’, while the second was the Berserker known as Minamoto no Raikou, whom stared at what had become of her Master with interest. She knew, of course, that the woman before her was her Master. Even if his body had changed, he still held all of his Command Seals. “Fufu… What an interesting situation, Master.” Her eyes darted to the bookshelf for a moment before looking at the talisman on the ground. “It seems an insect got more than it bargained for.”
“Master?” ‘Gudao’ replied, still disoriented but less confused about ‘his’ true identity. To begin with, why had ‘his’ mirror image just walked into Master’s bedroom? ‘He’ knew that it was possible to summon different versions of the same Servant and yet… But ‘his’ eyes wandered to look down at a concerned Mashu and ‘he’ put his own doubt aside as something maternal stirred within. “Mashu, you look so sad.” Suddenly becoming aware of her own nudity she moved toward the bed, materializing a latex bodysuit upon her body as she sat down and tapped her lap, a little jiggle rippling through her thighs as she did so. “Don’t worry, come rest your head here and let Mother comfort you.”