Mecha-Ude: Mechanical Arms - S01

Hikaru Amatsuga's quiet days end suddenly when he rescues Alma, a mechanical arm crying for help. Alma fuses with his jacket and introduces Hikaru to the world of mechanical arms: mysterious, sentient weapons that usually become part of their users' bodies. Forced to run for his life, Hikaru is eventually caught by Aki Murasame, a twin mechanical arms user who works for ARMS, an organization that protects the machines from unethical treatment. The Kagami Group, a corrupt organization that treats mechanical arms as mere tools, wants to recover Alma. ARMS sees Hikaru as a failure because he lacks a natural talent for wielding a mechanical arm, so Aki is assigned to be his bodyguard. But Aki is defeated by Jun Kagami, who cruelly tears out her two mechanical limbs, leaving the girl to die slowly. Unable to abandon Aki to her grim fate, Hikaru miraculously awakens his power and stops Kagami. Now a full member of ARMS, Hikaru is determined to uncover the truth about mechanical arms and protect his new friends and allies.