M3 the dark metal

M3 the dark metal (M3〜ソノ黒キ鋼〜 Emu Surī: Sono Kuroki Hagane, lit. "M3: That Black Steel") is an anime television series produced by Satelight. It aired from April 21, 2014 to October 1, 2014. It is directed by Junichi Sato, written by Mari Okada and has mecha designs by Shōji Kawamori. A manga adaptation with art by Kazuomi Minatogawa was serialized in Mag Garden's shōnen manga magazine Monthly Comic Blade from April 30, 2014 to September 10, 2015.

Plot
A distorted, endlessly black darkness. The location where the dark swallowed everything and took everything from us has become known as the Lightless Realm. Born there, as if they were mirror images of the despair and chaos humans felt, were aberrations. They were called Admonitions. An investigation of the Lightless Realm that eats away at the human psyche. Can a group of eight boys and girls gathered in an effort to combat the Admonitions see the light of the future beyond the Lightless Realm, while their past destinies and dangerous present intertwine in a complicated web?

Official

 * 『M3〜ソノ黒キ鋼〜』公式サイト