Based on the "Infinite Time Loops" concept created by Innortal at
http://www.fanfiction.net/u/681915/Innortal
I'd ask for his permission, but every method of contacting him that I can find requires that I register with a site or forum to do so. Since I have to be careful what I do with my Internet connection, I'll simply give him credit and hope that A) he never finds out about this, or B) if and when he does, he doesn't mind.
Anyway, this is meant to be (largely) light-hearted fun, since I thought the concept was particularly appropriate for Type-Moon works, given the number of routes and endings. None of these will be particularly long, or serious, and will be added to as I find time and/or inspiration. If it takes off, I might do a Tsukihime one, too (Cycles of the Moon?) Anyway, I hope you enjoy.
This looks promising.