Rated M ( I will have a warning before sex scenes. )
Shirou x Illya
I would quickly like to point out that many of the ideas, scenes, characters etc. don't line up perfectly if at all with the Fate/Stay Night series.
Disclaimer: I don't own the FSN franchise nor am I associated with it in any way.
Prolog:
After the loss of Berserker, Illyasviel was broken down and in tears. Berserker was the only friend she had, after the loss of her mother and the betrayal of her father. Broken down crying, Gilgamesh almost pitied her. He used his Noble Phantasm, aiming directly above her head. As if by cue, the moment he fired it stopped, 2 inches above her body, a with a sharp projected sword in between her body and Gilgamesh's spear. Gilgamesh was shocked but didn't show it. He smirked and created 20 noble phantasms, aiming them at the two. He backed away and was ready to fire. As he was about to, Rin took her chances and fired. A crimson red beam of light shot, hitting Gilgamesh in the neck, temporarily shocking him. She fired 3 more times while Shirou got Illya out of the way. They all ran, far from there. Shirou was caring the sad snow white haired girl in his arms. As they ran, Illya was looking up at her big brother, thinking to herself how much he helped her. He didn't notice that she was looking at him.
She reached her hands up and wrapped them around his neck, putting her head over is left shoulder. He was shocked, but didn't care. They kept running, and eventually ran back to Shirou's house. They all sat down and they were out of breath. Illya's face was completely tear stained, and she was nuzzling up to her big brother. As they all struggled to catch their breath, they feel asleep. Illya, being the only one awake, nuzzled into her brother and fell asleep, too.
Well I know this was a short chapter but hey, It's just the prolog, I will update within a few days, with a full-length chapter. I hope you come back, and Enjoy!