Amidst a war of Heroes, shall a Witch crash the party (Fate/Umineko)

Welcome to fuyuki city 10 years before the 5th holy grail war.

Right now, the 4th holy grail war is about to start, but there seems to be a witch of murders and closed rooms summoned! Will someone defeat this witch, or shall the golden land open.

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So I saw a fanfic that I liked, but it was dropped [ :( ], and it came out in 2012 so, I thought let's make this myself then! (The first few chapters will be like the original but with a few changes!)

Link to original: http://forums.nrvnqsr.com/showthread.php/1718-A-Witch-s-Tale-of-the-4th-Holy-Grail-War-%28Fate-Zero-Umineko%29

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Tags:
OP MC, Umineko, Fate zero, Umineko no Naku Koro ni and Fate.
(Because the tag system bugs sometimes... THIS ISN'T A HAREM STORY IDK WHY WEBNOVEL THINKS IT IS!!!)

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ENGLISH IS NOT MY 1ST LANGUAGE SO EXPECT BAD GRAMMAR!
DISCLAIMER: I DON'T OWN ANYTHING IN THIS FANFIC!