S01E01 Starry Night
Ten years have passed since the creation of the Lightless Realm, and the city of Kukujicho becomes more desolate as people's fears increase. Akashi Saginuma, an elite student attending Kukunochi Academy, gets called out by...
M3: The Dark Metal
S01E08: Reckless Forbidden Realm
A signal from a data recorder that an investigative unit left behind in an area that was engulfed by the Lightless Realm ten years ago had been received. It was that of the unit that Aoshi had once piloted. Harboring complicated emotions, Akashi heads to recover the recorder together with Heito. As soon as they enter the Lightless Realm, the two lose sight of each other. Immersed in abnormal levels of tension, Akashi and Heito eventually come to cross paths with their pasts.
Overview
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.
Episodes
S01E02 Embraced by The Reaper
"Those who hear the Corpse's song will die a mysterious death within nine days." As if that rumor became truth, an incident happened before Akashi and his class. Emiru and Mahmu head over to the...
S01E03 Seam of the Past
"The Reaper" was something created in order to defeat the Corpse. Akashi starts training as the pilot for "the Reaper," but with excessive stress, he cannot hide his mounting frustration. Meanwhile, Sasame Izuriha, the last...
S01E04 Danger, Do Not Mix
Akashi and the pilot candidates were dropped down onto a deserted island for mock investigation training in uncharted territory. While one condition for them to clear the mission was for "all members to gather in...
S01E05 Self in Vain
Synchronization of thought between the pilots is necessary to control a MA-Vess... Heito and Emiru, showing high synchronicity, are involuntarily paired up for field training near the Lightless Realm. However, as if it was reacting...
S01E06 Terror Fading Into Death
Everyone including Akashi was enveloped in deep sadness about the worst-case scenario that descended on Emiru. As if feelings the pilot candidates had like those were being ignored, they were ordered to go on 24-hour...
S01E07 Command of Solitude
The fact that the Corpse appeared outside of the Lightless Realm threw the entire academy into terror. While rushing their efforts to get the next prototype based on the Reaper into combat, they started selection...
S01E08 Reckless Forbidden Realm
A signal from a data recorder that an investigative unit left behind in an area that was engulfed by the Lightless Realm ten years ago had been received. It was that of the unit that...
S01E09 Blue Hart of Steel
Akashi escapes from the Lightless Realm. However, Heito and the second machine, Sable, are left behind in the Lightless Realm with no idea whether they are still safe or not. Akashi tries to leave IX...
S01E10 Your Song
Akashi, finding out the secret behind the Reaper that he pilots as well as the second machine piloted by Heito, quietly decides for himself to rere-enter the Lightless Realm. As Akashi does his best to...
S01E11 Red Lament of Cruelty
After Akashi's return, iwato and the other students were told of the second machine's grave secrets after grilling Natsuiri. Not heeding the anger felt by the students after hearing the cruel truth, Natsuiri proceeds to...
S01E12 What Links Two People
Sasame was praying for the safety of Akashi, who headed into the Lightless Realm. The original objective was the recovery of the second machine and Heito, but being so intent on protecting Sasame, Akashi continued...
S01E13 Roar of the Beast
The pilot of Gueules, the third MA-Vess that saved Akashi from his crisis, was Minashi Maki. Akashi becomes stricken with grief over reality of what the true identity of this MA-Vess is. As if he...
S01E14 Sounds of Regret
While the Lightless Realm continues to expand, the whereabouts of Akashi Saginuma remain unknown. Iwato and the other students left behind find out that they are known as the “children spirited away”. As the reasons...
S01E15 Vacant Heart of Morning Gray
S01E16 Promised Together
Akashi, Tsugumi, and the Gargouille members had all met one another when they were young. The memories of the past that Tsugumi shared with them clearly showed the reason why the Lightless Realm was created....
S01E17 Light of the Lightless
Akashi remembers the sin he had committed once upon a time in the Lightless Realm. Tsugumi's intent was to seek revenge against the eight children, including Akashi. The Corpse has now revived and starts to...
S01E18 The Truth of Yomijima
To research the secret of the Arbornine that prevents the Necrometal infection from spreading, Suzaki, Akashi and the others secretly headed over to Yomijima, the island where Minashi and the two girls were born. The...
S01E19 The Black Sunset
Controlling the MA-Vess loaded with Mimei, Natsuiri fends off the Admonitions created by the regrets of the islanders. However, Necrometal starts to slowly eat away at his body. Meanwhile, Akashi's group, seeking escape from Yomijima,...
S01E20 Overlapping Sound of Love
The right to command Akashi and company after their return from Yomijima was handed off to Suzaki. Kasane, who wants to solve the mystery behind the Lightless Stone, heads to the abandoned hospital in search...
S01E21 You Will, to the Birth Cry of the End
Controlling the MA-Vess loaded with Mimei, Natsuiri fends off the Admonitions created by the regrets of the islanders. However, Necrometal starts to slowly eat away at his body. Meanwhile, Akashi's group, seeking escape from Yomijima,...
S01E22 Light, and Then Light
Minashi alone defies orders and goes on ahead. He arrives at the Corpse in order to give Tsugumi some consolation, but Tsugumi interrupts him and lashes out in anger. The rapidly expanding Lightless Realm envelops...
S01E23 Proof of the Strongest
S01E24 Original Sin, Past and Future
Cast
Yoko Hikasa
Emiru Hazaki (voice)
Ayumu Murase
Heito Isaku (voice)
Kotori Koiwai
Sasame Izuriha (voice)
Sayuri Yahagi
Raika Kasumi (voice)
Tetsuya Kakihara
Minashi Maki (voice)
Tomoaki Maeno
Iwato Namito (voice)
Yoshitsugu Matsuoka
Akashi Saginuma (voice)
Misato Fukuen
Maamu Yuzuki (voice)
