In a dark void known as the Lightless Realm, a group of children meet and bond, but are then separated and returned to their own dimension. Years later, these children reunite to fight "Admonitions," monsters that originate from the same void, using robots known as "Vess." However, their efforts only slow the ever-encroaching and expanding Lightless Realm from infecting their world.

Their lives take a drastic turn when a new foe appears in the form of a "Corpse," whose song is rumored to kill any who hear it within nine days. The "Corpse Song" is heard by the group, and with this, they each begin to pull away and become caught up in their own personal problems—ultimately threatening the fate of humanity.

Series Cast

  1. Yoko Hikasa

    Yoko Hikasa

    Emiru Hazaki (voice)

    24 Episodes

  2. Ayumu Murase

    Ayumu Murase

    Heito Isaku (voice)

    24 Episodes

  3. Kotori Koiwai

    Kotori Koiwai

    Sasame Izuriha (voice)

    24 Episodes

  4. Sayuri Yahagi

    Sayuri Yahagi

    Raika Kasumi (voice)

    24 Episodes

  5. Tetsuya Kakihara

    Tetsuya Kakihara

    Minashi Maki (voice)

    24 Episodes

  6. Tomoaki Maeno

    Tomoaki Maeno

    Iwato Namito (voice)

    24 Episodes

  7. Yoshitsugu Matsuoka

    Yoshitsugu Matsuoka

    Akashi Saginuma (voice)

    24 Episodes

  8. Misato Fukuen

    Misato Fukuen

    Maamu Yuzuki (voice)

    24 Episodes

Full Cast & Crew

Last Season

M3: The Dark Metal

Season 1

2014 | 24 Episodes

Season 1 of M3: The Dark Metal premiered on April 22, 2014.

View All Seasons

M3: The Dark Metal
M3: The Dark Metal


Original Name M3 ~ソノ黒キ鋼~

Status Ended


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Type Scripted

Original Language Japanese


Content Score


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