M3: The Dark Metal
M3 ~ソノ黒キ鋼~
We checked 8 streaming services in India on 04 Jun 2026 at 12:23 IST
About
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.
Cast
Seasons
Episodes
Season 1
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.
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.
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...
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.
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.
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.
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...
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.
Where does M3: The Dark Metal rank today?
M3: The Dark Metal is #1636 on the CineFlixo Daily Streaming Charts today.
- Highest: #1636
- Top 10: 0 days
- Top 100: 0 days
Watch M3: The Dark Metal Online Free — All Episodes in HD
Looking for a place to watch M3: The Dark Metal online for free? You've landed on the right page. M3: The Dark Metal is a well-rated Japonés animation, drama, action & adventure, sci-fi & fantasy, and mystery series from 2014 that you can stream right now on CineFlixo in high quality, no signup required.
About 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. Across 1 season and 24 episodes, originally airing on Tokyo MX.
M3: The Dark Metal Cast and Characters
The cast features Yoko Hikasa (as Emiru Hazaki (voice)), Ayumu Murase (as Heito Isaku (voice)), Kotori Koiwai (as Sasame Izuriha (voice)), Sayuri Yahagi (as Raika Kasumi (voice)), and Tetsuya Kakihara (as Minashi Maki (voice)). Their performances are a major reason M3: The Dark Metal has built such a passionate audience.
Where to Watch M3: The Dark Metal Online
CineFlixo lets you stream M3: The Dark Metal online free, instantly, in HD. There's nothing to install — open the page, hit play, done. Works perfectly on Jio, Airtel, Vi networks across India and on slow mobile data thanks to our adaptive video pipeline.
▶ Watch M3: The Dark Metal NowWhy People Are Watching M3: The Dark Metal
M3: The Dark Metal flies under the radar but it deserves your attention. What makes it work is emotional weight that hits where it counts, action sequences that don't feel cheap, tight pacing that earns its twists, and world-building that respects the audience's intelligence. If you enjoy Japonés storytelling that doesn't follow the same tired beats, this is the kind of show you'll end up recommending to friends.
Frequently Asked Questions about M3: The Dark Metal
Where can I watch M3: The Dark Metal online for free?
You can watch M3: The Dark Metal online free on CineFlixo. Just open the page and hit play — no signup, no subscription, full HD streaming on phone, tablet, or desktop.
How many episodes does M3: The Dark Metal have?
M3: The Dark Metal has 24 episodes across 1 season. All episodes are available to stream right here on CineFlixo.
Is M3: The Dark Metal good? What's the rating?
M3: The Dark Metal holds a 7.2/10 rating based on 5 reviews — well above average.
Who is in the cast of M3: The Dark Metal?
The main cast includes Yoko Hikasa, Ayumu Murase, Kotori Koiwai, and Sayuri Yahagi, plus a strong supporting ensemble.
Is M3: The Dark Metal available in Japonés?
Yes — M3: The Dark Metal was originally produced in Japonés and that's the version you'll stream here on CineFlixo. English subtitles are provided when available.
When was M3: The Dark Metal released?
M3: The Dark Metal first aired in 2014.
Do I need an account to watch M3: The Dark Metal on CineFlixo?
No. CineFlixo is free and you can watch M3: The Dark Metal without creating an account. Sign-up is optional — only useful if you want a personal Watchlist or to comment on episodes.
Similar Series You Might Like
If you enjoyed M3: The Dark Metal, check out Buffy the Vampire Slayer, Bosco Adventure, Carnivàle, Negative Positive Angler, and Harmony of Mille-Feuille.
Frequently Asked Questions
Where can I watch M3: The Dark Metal for free?
You can watch M3: The Dark Metal online for free on CineFlixo. All 24 episodes across 1 season are available to stream in HD without a subscription, signup, or paywall. Just open the show page and press play.
How many seasons and episodes does M3: The Dark Metal have?
M3: The Dark Metal currently has 1 season and a total of 24 episodes. The series status is "Ended", so the episode count may grow as new seasons are released. You can browse the full episode list on CineFlixo and continue watching from where you left off.
What is M3: The Dark Metal about?
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-e… It belongs to the Animation, Drama, Action & Adventure, Sci-Fi & Fantasy, Mystery genres.
In which language is M3: The Dark Metal originally available?
M3: The Dark Metal was originally produced in JA. On CineFlixo the show is available in its original JA audio. Check the player options on the watch page for available subtitle tracks.
When was M3: The Dark Metal first released?
M3: The Dark Metal first premiered on April 22, 2014 (2014). The series has since concluded its run.
People Also Search For
💬 Comments0
Join the conversation
Share your thoughts, rate episodes, and connect with other fans
Hey everyone! 👋 Welcome to the discussion.
Feel free to share your thoughts about this series — what did you love, what surprised you, which episodes are your favorites? 🎬
Got ideas for what we should add to CineFlixo? Want to suggest a series? Drop it here! We read every comment ✨
Similar Animation Shows
More series like M3: The Dark Metal you may enjoy
★ 8.6JUJUTSU KAISEN
2020
★ 7.9Re:ZERO -Starting Life in Another World-
2016
★ 8.4Bleach
2004
★ 6.5My Wife Has No Emotion
2024
★ 8.5SPY x FAMILY
2022
★ 8.4Naruto
2002
★ 8.8Frieren: Beyond Journey's End
2023
★ 8.6The Apothecary Diaries
2023
★ 8.0Pokémon
1997
★ 8.6JoJo's Bizarre Adventure
2012
★ 8.7Hunter x Hunter
2011
★ 8.4Dragon Ball Z
1989
Recommended for You
Based on this series
