Fate/Ragnarok

Story's Description:
Year 2022, a Holy Grail War has been held at the entire Hokkaido Prefecture. Amidst the beginnings of the bloodiest grail war in Japan, a young man, Oda Reo, will begin his greatest experience as a participant of the Holy Grail war.

Disclaimer:
This is not an actual story of any Holy Grail war and in the Nasuverse in General.

This is just a fanmade story of mine is simply using many elements from the Nasuverse and apply this to the story.