M3: The Dark Metal — Season 1, Episode 9: Blue Hart of Steel
Animation, Drama, Action & Adventure, Sci-Fi & Fantasy, Mystery • 25 min • 1 season, 24 episodes • ★ 7.2/10
Episode synopsis
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.
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.