"The human race will become extinct in 2017." The Chaldea organization, an organization charged with preserving the future of humanity, observes a singularity. To solve it, Rika Fujimaru and Mash Kyrielight will be transported to the city of Fuyuki in 2004. The battle for the future of humanity has begun.

(Source: Anime News Network)

Note: This manga adapts the first, third, fifth, seventh and final singularity from Part 1 of Fate/Grand Order.