Mechanical Arms

Hikaru Amatsuga, an average middle schooler, forms an involuntary partnership with the rare Mecha-ude Arma, who resembles a mechanized limb. To protect Arma, the resistance group ARMS assigns Aki Murasame, a dual Mecha-ude user, to follow Hikaru. Aki is also searching for a Snake-Type Mecha-ude wielder connected to her comrades' critical condition. As the Kagami Group seeks the mythical "Trigger Arm," a powerful Mecha-ude, Aki's life is threatened, prompting Hikaru and Arma to join forces and learn the true nature of their lives.