The Only Thing You Can Change

Some wishes are really more important than the others? And who has right to decide about it? Another Archer was summoned for Tohsakas in the Fourth Grail War and this may change everything. But there's always a price for messing with someone's fate. A completely different story featuring most of Fate/Zero (part I) and Stay Night (part II) characters, and a little Hollow Ataraxia.