Season
- Season 1 2014-04-22
Episode
- Episode 1: Starry Night
- Episode 2: Embraced by The Reaper
- Episode 3: Seam of the Past
- Episode 4: Danger, Do Not Mix
- Episode 5: Self in Vain
- Episode 6: Terror Fading Into Death
- Episode 7: Command of Solitude
- Episode 8: Reckless Forbidden Realm
- Episode 9: Blue Hart of Steel
- Episode 10: Your Song
- Episode 11: Red Lament of Cruelty
- Episode 12: What Links Two People
- Episode 13: Roar of the Beast
- Episode 14: Sounds of Regret
- Episode 15: Vacant Heart of Morning Gray
- Episode 16: Promised Together
- Episode 17: Light of the Lightless
- Episode 18: The Truth of Yomijima
- Episode 19: The Black Sunset
- Episode 20: Overlapping Sound of Love
- Episode 21: You Will, to the Birth Cry of the End
- Episode 22: Light, and Then Light
- Episode 23: Proof of the Strongest
- Episode 24: Original Sin, Past and Future
M3: The Dark Metal
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.
