Fan Translation:
"I think it's about time that we should talk.
A talk about......what Miyu and I have gone through up to now."
Miyu was a God Child who could fulfill every wishes indiscriminately.
Shirō took in the girl, who has no relatives, into the house he has been living with Kiritsugu. Five years after that, the two of them came to live peacefully like true brother and sister.
However, that kind of everyday life suddenly came to an end.
The two of them were visiting Miyu's birth house. But before they could, Julian, who wanted Miyu as a "Miracle", appeared―――.
Miyu and Shirō, and their connection with the Ainsworth, is told here.