M3: Sono Kuroki Hagane  

M3 - Sono Kuroki Hagane, M3 ~ソノ黒キ鋼~, M3 the dark metal, M3~黑色钢铁~, ام 3: فلز تیره, M3: Sono Kuroki Tetsu, Mortal Metal Memories

The realm where darkness has consumed all and taken everything from us is called the Lightless Domain. This place was born out of despair and chaos, producing beings known as Admonitions. These creatures were created to reflect our own feelings of hopelessness and confusion. As they investigate this domain that threatens their sanity, a group of eight children come together in an attempt to combat the Admonitions and find hope for the future beyond the realm's boundaries. However, their past destinies and present circumstances are intertwined in a complex web, making it difficult to break free from its grasp.