Fate/Grand Order Absolute Demonic Front: Babylonia, Pt. 1 - Simuldub

2017 AD. Researchers and scholars of both Magecraft and science have been gathered to maintain human civilization under the Chaldea Security Organization.

But calculations then proved the extinction of humanity in 2019.

The cause is "realms that cannot be observed" that suddenly appeared in various eras of history, called "Singularities." Ritsuka Fujimaru, the one Master remaining in Chaldea,...