M3: Sono Kuroki Hagane

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 his teacher along with his amiable friend, Iwato Namito. There, they are informed of a "pilot training course" that only the most outstanding of students become selected for. (Source: Daisuki)

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 ruins of a hospital in order to confirm the other rumor that "the Reaper" -- something that supposedly can defeat the Corpse -- was dormant there. And there, they meet Heito Isaku, another one who was chosen to be part of the pilot training course. (Source: Fandom)

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 of the pilot candidates, finally transfers into class. Akashi finds that Sasame is somehow on his mind and tries to talk to her... (Source: Fandom)

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 one location," Iwato and Raika fear the danger that Heito, who landed on the deserted island earlier than the others, possesses. While the candidates are enveloped in anxiety and terror beyond words, it was Sasame's singing voice that guided Akashi and the others. (Source: Fandom)

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 to the terror Emiru hides deep within her heart, the environment becomes surrounded by an abnormal atmosphere. Over time, Heito's insanity corners Emiru, forcing a situation where there was no turning back from. (Source: Fandom)

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 standby for security reasons. While Minashi, who disobeyed the standby orders, and Heito, whose mind was fixated on Emiru, were heading to the laboratory, an unexpected enemy assaults the academy. Akashi, moved forward by Emiru's wishes, boards the Reaper and sallies forth. (Source: Fandom)

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 for its pilot; and there, Natsuiri comes up with a certain plan. One night, Akashi visits the ruins of a town at Kasane's request, but the person who awaited was Heito. The case involving Emiru has Heito's hatred of Akashi showing openly, leading to his incessant taunting of Akashi... (Source: Fandom)

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. (Source: Fandom)

Blue Heart 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 saying that he will never pilot the Reaper again, but when he randomly drops by the hangar, Natsuiri calls him back. Natsuiri, intent on the recovery of the second machine, starts to talk about a certain system that is aboard the MA-Vesses. (Source: Fandom)

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 continue the search despite the encroachment on his psyche as well as the confusion caused by Aoshi's memories blending in, the Admonition attacks him yet again. After much painstaking effort, Akashi finally finds the second machine, but... (Source: Fandom)

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 act in an even more surprising way. However, given the possibility of resolving a certain situation, Akashi becomes determined to defeat the Corpse no matter what. As he trembles in regret and anger, Akashi bumps into Sasame at a moonlit wooden terrace. (Source: Fandom)

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 to attack the Corpse, which had appeared. However, the Corpse's fierce attacks pushed the Reaper back and severely damaged it. Sasame, feeling the situation at hand, and with encouragement from Minashi's words... (Source: Fandom)

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 was taking out all his anger that now has nowhere to disperse to, he starts retaliating against the Corpse. Akashi and the Reaper mercilessly corners the Corpse, but then, one girl, who he confuses as Sasame, shows herself and destroys the Corpse. (Source: Fandom)

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 why they were gathered together become more apparent through reading Mahmu's old notebooks, Mahmu decides to pilot Sable, the second machine, in order to grant Emiru's wishes, which was to live for the sake of happiness instead of revenge... (Source: Fandom)

Vacant Heart of Morning Gray

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. Meanwhile, due to the activation of the Lightless Realm, IX headquarters also faces an attack from Admonitions. Natsuiri is assaulted as well. Raika and Iwato head out on Vesses to protect the place that Akashi and the others can return to, and do their best to fight; however... (Source: Fandom)

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 overpower Mahmu and Minashi with Tsugumi's anger and insanity. Akashi rushes over to the Argent in order to stand up against the Corpse. The roar of the Reaper echoes alongside his strong desire to seek salvation for Sasame. (Source: Fandom)

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 memories of the massacre that happened in the now ruined IX laboratory flooded into Minashi. Just then, Natsuiri, who had chased the group to the island, shows up together with the "very first MA-Vess." (Source: Fandom)

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, becomes reunited with the stray Minashi at the back end of a small, old shrine on the island... (Source: Fandom)

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 of materials left behind by Natsuiri. However, during her search, an Admonition attacks. Akashi heads to rescue her aboard the Argent, but Kasane could feel nothing but uneasiness at its unnatural resonance rates. (Source: Fandom)

You Will, to the Birth Cry of the End

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 even the IX tower that Kasane and Suzaki are in. While Mahmu keeps the Corpse's attention on herself at the front line, Akashi was hearing Heito's voice calling out to him. (Source: Fandom)

Proof of the Strongest

Original Sin, Past and Future

Akashi and Minashi are inside the corpse. As Akashi walks, he sees the past. Akashi saw the time when Tusugmi felt alone, their first sing against Tsugumi. Then, Akashi and Minashi meet.They first talk but end up Minashi trying to infect Akashi with Necrometal. Suddenly, Sasame appears and stops Minashi from doing so. Minashi then appears inside the corpse and is rebelling against them sticking to his opinion. Sasame then guises as the GUEULES and resonates with Akashi trying to defeat Minashi. Akashi and Sasame felt that resonating with each other was warmer than what they've felt before. At the moment Akashi and Sasame were about to be defeated, the others came to help but it wasn't enough. Tsugumi later on realized what she has done to the corpse and somehow stopped the corpse and Minashi. Akashi offers a hand to Minashi to start over. Sasame and Akashi tells him about reaching out to each other so they can be unified in a harmless way. The Lightless Realm has been stopped. Kasane and the others have found a way to revive the people who were made into Vesses. In the end, it's shown that Akashi is outside looking at little kids playing reminding him of when they were little. It's also show that Raika and Iwato were playing basketball with Raika losing and Iwato bragging. Heito is then shown recovering while holding his teddy bear. After that, Tsugumi and Minashi are talking while Minashi recovers. Mahmu is seen telling a story to Emiru. As Akshi walks, he finds Tsugumi sitting on a tree branch. It's told here that the corpse was still around. Tsugumi also feels sorry for Sasame. At the very end, Akashi goes to visit Sasame in the hospital. As soon as he sees Sasame open her eyes, tears of joy comes out from Akashi's eyes. (Source: Fandom)