For reasons unknown, Nasu has hired (You) to write a story regarding the Third Holy Grail War. He has given you the creative freedom to do whatever you wish, only stating that you should abide by the following information
>Takes place in Fuyuki in the 1930s, on the cusp of WWII
>Acht has the Einzbern Forest and Castle ready
>There are two Edelfelt sisters who summom a Saber-class Servant in two aspects due to their Ore Scales
>The Matou, Tohsaka, and Einzbern participate
>The Church supervises the HGW for the first time
>The Einzberns summon Manjew who dies early
>The Edelfelts get to the end but lose to the Tohsaka heir
>The older Edelfelt leaves Japan and promises to never return
>The younger Edelfelt's fate is unknown
>The Lesser Grail was destroyed before the victor had been decided
>The evocation site of the Grail is at the Fuyuki Church
>Only "proper" Heroic Spirits can be summoned
>Fighting for the Lesser Grail also happened between the Imperial Army and the Nazis in the Imperial Capital