Fate/Grand Order: First Order

In 2015, the Chaldea Security Organization observes human history through both magecraft and science and discovers an impossible result: humanity's future suddenly ends. Before researchers can determine why, an explosion tears through the facility, and new staff member Ritsuka Fujimaru survives alongside Mash Kyrielight only to be transported to the first Singularity, Fuyuki in 2004.

There they find the Holy Grail War reduced to a burning ruin populated by hostile Heroic Spirits. With Mash transformed into a combat-capable Servant, Ritsuka must repair the distortion in history and find a way back to Chaldea. What begins as a survival mission reveals that the missing future is no isolated accident but the opening of a battle to restore human history itself.