M3: The Dark Metal — Season 1, Episode 14: Sounds of Regret
Animation, Drama, Action & Adventure, Sci-Fi & Fantasy, Mystery • 25 min • 1 season, 24 episodes • ★ 7.2/10
Episode synopsis
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, Mahmu decides to pilot Sable, the second machine, in order to grant Emiru's wishes.
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.