Set in the universe of the game NieR:Automata and based on the stage play, YoRHa Boys is the previously untold tale of the formation of YoRHa Experimental Unit M - the beginning of both "curse" and "punishment" of androids dreaming of the glory of mankind.
 
(Source: Square Enix, altered)

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)

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