
S01E01 Mecha-Ude User
Hikaru Amatsuga is a middle school student who lives in Kita-Kagami City and one day, he hears cries for help and finds a mechanical lifeform in the shape of an arm named Alma. Before he...
After a fierce battle with Amaryllis, Alma regains his memories. His expression seemed grim, so Hikaru asks him what's wrong, but then Alma runs away. In order to get clues of where Alma may have gone, Hikaru goes to ARMS HQ to see Alma's older brother, Fist. Fist then explains the past of all of the Mecha-Udes including Alma.
Hikaru’s ordinary middle school life takes a thrilling turn when he encounters Alma, an alien entity resembling a mechanized limb called Mecha-Ude. Alma, a member of a rare species, is fleeing from a sinister group hunting their kind down in search of one possessing unparalleled power. Tasked by the resistance group ARMS, this unlikely duo will embark on a perilous journey to save the Mecha-Ude.