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Shared Resonance of Possession Experience	By : ArashiLeonhart Category: +. to F > Fate/stay Night Views: 9792 -:- Recommendations : 0 -:- Currently Reading : 0
Disclaimer: I do not own TYPE-MOON and associated verse and characters. I make no money on this, although in Japan, I could.

Chapter List
- 7
- 8
Omake 2
Inheritance

Sion knocked lightly on the door and only had to wait a few seconds before it opened.
“You don’t have to wait outside, you know. I gave you a key,” Rin Tohsaka said.
The alchemist followed the magus inside, placing her suitcase down next to the coat hanger and closing the door behind her. She fiddled with her jacket since she was bundled up quite a bit; London was a cold place after all, especially after the official start of winter. “It is still proper to do so. It is your place. I feel like I am intruding otherwise.”
“If I weren’t home, would you just hang around at the front door like a creeper?” Rin took the luggage and pulled it into the hallway leading to the bedrooms.
They had something akin to this argument whenever Sion came to stay for a while, in the year since Rin had given her said key. The alchemist was not a regular enough visitor to make it a monthly conversation, but she had come to stay for a week at a time seven times in the past ten months. It was almost, almost, a place she considered home, yet still not enough that she felt entirely at peace there.
“I would call you on your phone,” Sion said, allowing herself a faint smile. “Assuming you remembered to carry it.”
“I did today,” Rin grumbled.
After hanging her coat and scarf up and removing her boots, Sion followed the magus into the master bedroom. She quickly took in the apartment and any changes since she had last visited: furniture moved approximately three centimeters in one direction, floor cleaned recently, a single cardboard box out on the sofa with a variety of tools sticking out, a new picture frame, the television on but muted with animated children dancing on screen to a piano player. A small Christmas tree decorated an end table in the corner, a scattering of packages beneath it.
Rin pulled the suitcase up to one wall and waved her hand in another direction; the gas fireplace at the opposite wall made a quiet whoosh as it lit up.
Sion smiled again, this time not entirely of her own accord. Installed when Shirou had still been alive, it was an amusing anecdote to their shared life, of Shirou’s more modern nature but Rin’s reticence toward upgrading their current heating system. It was an entirely too-petty fight when they had it installed, but in the winter following and now this winter over a year later, it seemed as if Rin could not live without it.
Nor could Sion, since the room was far too cold without it.
This was where things looked different, however. Some of the pictures on the walls had been removed and the desk, usually cluttered with the various beakers and measures of a magus now, while still present, did not amass like a hoard of hungry animals about the surface. It was cleaned up and organized more than was normal. Even the bed was made—not quite so common with not-a-morning-person-Rin Tohsaka as might be expected.
Sion knew something was happening. Far from concerned, she half expected what was to come—after all, the mind within her own gave her a few clues.
“How was…Georgia, was it? Must have been difficult operating in a war zone.” Rin opened the closet and regarded where space might be available.
“Difficult, but it went as was expected, unexpectedly.”
Even Rin gave her a dirty look for that kind of statement. Sion considered the kind of bombshell Rin seemed to be edging her way into.
The situation was not ideal, but of anybody for Sion to have come to know, it seemed that Rin Tohsaka might be one of the few that could find a way to help her. The research that had been left to the Tohsaka family regarding the Second Magic and its ties to both quantum data fracture and recovery (what Sion called it to Rin’s sometimes-amusement) and time manipulation was useful to the issue of Dead Apostle reversal. Though Rin had yet to manufacture the Mystic Code central to the idea and the device that she thought would give them the resource to absolutely cure Sion of her ailment, the stepping stones the magus had made toward it had done wonders to at least alleviating many of Sion’s problems. It allowed her to make extended trips to the far reaches of the world, both pursuing the pattern TATARI manifested in, as well as other problems in the world.
In short, she was able, to a limited extent, live out the many and fractured lives that were now hers.
She still had to return to London periodically—even if she would have regardless—and in that time she would assist with Rin’s work as much as possible. Between Sion’s own understanding of theoretical compounds, the data she had access to from Unlimited Blade Works, and even knowledge on phenomena like TATARI had accelerated Rin’s work. Although Sion did not know what exactly Rin did while Sion traveled, the alchemist had suspicions that it involved locking herself away for many hours without sight nor sound of anything else as she attempted to replicate one of the great mysteries of the Association. By the time Sion returned, she was often a little stir-crazy.
Not that these were even the central things on Sion’s mind when she visited.
Sion’s hands came up to wrap around Rin’s waist, pulling the magus flush to her and allowing Sion to tickle her own nose with Rin’s locks and scent. “I thought of you frequently,” she said.
“Geez, I haven’t even put your things away,” Rin said, her voice only half a complaint. Despite the strange phrasing, the witch had long since realized that Sion’s way of being affectionate was to say something along the lines of “thinking” and “considering” rather than emotions and feelings. Actually, after getting over the initial awkwardness, it was strangely cute. She allowed herself to be pulled into a tight embrace, head lulling back just enough to press the temple of her forehead to Sion’s.
“It looks to me as if it might be more efficient to leave my things as they are,” Sion said. “Something important is clearly on your mind.”
Rin grumbled. “I hate that everyone in my life has always been telepathic.”
“Indeed, I am aware that Shirou had a 78% chance of preempting your words, Saber had a 91% success rate at bringing up thoughts you were considering, and Archer managed to outmaneuver yo—”
“Alright, alright, I know, don’t rub it in.” Rin sighed, one hand coming up to curl up into Sion’s cheek. “Lemme go and I’ll show you my plans.”
“Hmmm.” Sion allowed her fingertips to wander, brushing one just beneath the waistline of Rin’s skirt just above her hip. “You can tell me later. For now, I will give you an excuse to leave my things as they are and foil your carefully constructed plans to see what your holiday present is.”
Rin scowled but did not deny the statement nor the touch, her hips delicately but persistently moving back into Sion’s body. “Stingy.”

Sion certainly was stingy when she wanted to be—in fact, possibly owning to the mental influence of their shared previous lover, possibly due to the feral hunger of the Apostles to control and dominate a living being, she could be downright mean.
There was just something pleasing about watching Rin Tohsaka squirm in desire until the prideful girl was reduced to begging. Pressed as she was to the cold of the bedroom window, her overheating breath fogged the transparency and her breasts streaked sweat across the surface, she moaned and tried to press her ass back into Sion’s body, blindly seeking the pleasure of tickling fingertips.
Sion gently rocked her own body into Rin’s, wet folds enticingly too far to touch but too close to not feel the heat of another body, the motion just enough of a reminder to both to keep pleasurable thoughts at the forefront of their minds. Sion teased the dark-haired girl by running her hands up Rin’s thighs, up her hips, circling to her naval to rub circles there—intentionally the exact touch that had brought Rin close moments before. Sion leaned her entire body forward, her own breasts pressing to Rin’s backside and breath playing along the curve of her right shoulder.
Rin curled around, tongue attempting to pull in a kiss, but Sion only let the faintest touch of her lips grace Rin’s before she drew back, a scary look curling her lips—
She bit Rin just below her neck at the same time as sliding her fingertips once more to where her wiggling rear wanted them.
Rin cried out, nearly shrieking, pressing into both touches and rocking her body in time with Sion’s fingers and rocking hips, trapped between body and touch and the raking of teeth and swirling of a tongue along her skin. Sion held her, free hand coming up over one of Rin’s, pressed to the glass, leaning so they would both fall right out of the building if the window popped out.
Which Sion knew had happened to Rin once upon a time, leading to the very situation that had ousted she and Shirou as a couple years ago. She absently calculated the likelihood that it would happen now and the Clock Tower would then become aware of the relationship one of their students had with a sealed target from Atlas.
“Sixty-two percent,” Sion said to herself. Statistically greater than chance. Rin Tohsaka’s “luck” was a viable variable. “I did not know I was such a gambler.”
“Hmmmuuuhh?” Rin whimpered, looking back at Sion with glazed eyes.
“I believe the Shirou in me desires to improve those chances,” Sion said.
Rin made another unintelligible sound as Sion slid her entire body down to kneel behind the magus, her tongue forcing Rin to grope frantically for purchase against the window again, a low moan resonating along the glass surface.

“I’m done with the Association,” Rin said.
Her voice was quiet, even a little ticklish against Sion’s skin, breath playing along the alchemist’s collarbone. Sion managed not to squirm at the sensation as well as the words. “I see.”
Rin grinned. I see was Sion’s neutral statement that really meant I have absolutely no clue as to what your meaning is, despite comprehending the structure of the phrase you just vocalized. She let a pleasant laugh take her. “I’m almost ready to recreate it, and I don’t want to endure the maneuvering that goes along with it. I’ve actually made it look like I’m getting more and more frustrated with failures and have decided to return home to lick my wounds.”
“I would be more than happy to assist you with your wounds,” Sion said almost automatically, then seemed to re-run what she had just said through her head, looking perplexed.
Laughing again, Rin sat up on one elbow. The carpet was thankfully very cushy, though they had at least dragged the bed comforter and a couple of pillows up so they were not just a pile of nakedness in the middle of the floor. “I don’t mean it literally. Maybe figuratively, even if it was a bluff.” She brushed her hair back over her shoulder. “Two people in my life that aren’t approved of by them, and they really won’t approve of me if I were to announce my results. I’m ready to get out of here.”
The frown that Sion gave her was very much one that would have fit Shirou’s face much better. “Did you not want a position here for many years?”
“Well, it was a thought, but not really paramount to my goals.” Rin gave a helpless shrug. “I am still responsible for my home. I also have nothing else here that I need to pursue that I cannot elsewhere, so long as I make a trip here every once in a while.”
“I see.”
Smirking, Rin pulled up just enough so she was straddling the other girl, skin pleasantly sliding against skin until they were face-to-face. Perhaps it was better this way, as it did not seem quite so forced or awkward with the barriers of intimacy as they were currently. “I know that until we have a cure and until the Blood Lair is still active, you won’t plan on settling down, and that’s fine with me. But you’re also Shirou,” she said these words strangely, as if realizing once they were taken to the air they were backwards or confusing, “and Fuyuki is your home if you want it to be. I’ve talked with the Fujimuras and they’ve agreed to turn the house over to me, if you want it.”
Sion reached up, brushing the knuckle of her index finger up Rin’s belly and sternum—a touch that the alchemist seemed to do as if reminding herself that the body before her was not a visual illusion. She looked contemplative, head tilted slightly, eyes tracing over every line and curve of Rin’s body. “I want to go where you go, Tohsaka.”
Rin closed her eyes to the feathery touch, let out the breath she was holding, and nodded to herself. Someday, she wanted to sort out how much of that was Sion, how much of that was Shirou, and what that exactly meant for them, but for now it was enough to hear the words. She leaned down, pressing her body into Sion’s and curling her arms around the alchemist’s shoulders to hold her for a long, enthusiastic kiss.
She would content herself now with exploring every minute detail of difference between the two of them when they were breathless and gasping for more.
- 7
- 8
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Shared Resonance of Possession Experience