A hovering, talking magical tome that travels with [Nier](https://anilist.co/character/138303) and serves as his medium to magical spells known as Sealed Verses, in the hopes of collecting all of them to cure Nier’s sister, [Yonah](https://anilist.co/character/138305/Yonah).

~!Originally a human male, he was absorbed into a grimoire after being subjected to experiments by the Hamelin Organization.!~

The distant future, 5012. 
The sudden aerial invasion of Earth by ＜Aliens＞ and
their creations ＜Machine Lifeforms＞led mankind to the brink of extinction.
The surviving number of humans who took refuge on the moon to organize a counterattack using
＜android＞ soldiers to recapture Earth. 

However, the war reaches a stalemate as the ＜Machine Lifeforms＞ continue to multiply infinitely.
In turn, humanity deploys anew unit of android soldiers as an ultimate weapon: ＜YoRHa＞ 
Newly dispatched to Earth ＜2B＞ joins＜9S＞, the analyst currently stationed there, where amid their mission, they encounter a myriad of mysterious phenomena... 

This is the story of these lifeless ＜androids＞ and their endless fight for the sake of mankind.
 
(Source: NieR:Automata Ver1.1a Official USA Website) 
Note: Episodes 9, 10, 11, 12 aired back-to-back on July 23, 2023.

When alien forces invade with an army of Machines, the remnants of humanity must depend on Androids of their own design – the placid 2B and the excitable 9S – to survive. 
(Source: Viz Media)

A collection of short stories about Nier:Automata.

In the distant future, humanity struggles for survival against the threat of creatures called Shades. A boy named Nier lives with his little sister Yonah in one small village, scraping by on the goodwill of neighbors and friends.
 
When a terrible illness assails Yonah, Nier's life begins to change at a dizzying pace. Lunar Tears. The Black Scrawl. The Song of the Ancients. The Shadowlord. Petrification. These things and more will turn his world upside-down—and change it forever.

Shiro no Sho