The Holy Sword Wielder Does Not Believe In God.

She fought her aunt during the 6th Holy Grail War and managed to end her, leaving a significant dent in Fuyuki's countryside.

Waking up very much alive, she takes in her surroundings and notes that she is in a city.

One small problem:

This is not Fuyuki and she finds herself without any money, ID or possession.

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Cover is a still from the anime.