MECHA-UDE VOL.1-12 END

STORY :

Long ago, alien lifeforms came to Earth, fusing with people on the planet. Due to their appearance, they were dubbed "Mecha-ude," as when fused, they bore a striking resemblance to mechanized limbs.
Through an involuntary partnership, average middle schooler Hikaru Amatsuga works alongside the Mecha-ude Arma, who is an extremely rare and special existence. To protect Arma, the resistance group ARMS assigns the dual Mecha-ude user Aki Murasame to follow him wherever he goes. However, she is also looking for a mysterious Snake-Type Mecha-ude wielder, who has put many of her comrades in a critical state.
Behind the scenes, an organization known as the Kagami Group is searching for the mythical "Trigger Arm," a Mecha-ude said to grant unlimited power. When Aki's life is threatened by this group, Hikaru must team up with Arma to find the courage to fight back and, along the way, learn that his life will never be ordinary again.

住在北镜市的中学生赤冢光有一天遇到了神秘的“手臂”型机械生命体Alma。Alma为了从小光那里得到能量，尝试与他的身体结合也失败了。竟然和小光穿的PARKER结合了。
另一方面那个时候，企图夺取机械手臂们的自愿成为兵器的大企业“镜GROUP”追赶着Alma的身体。并且为了拯救机械手臂们解放活动的组织“ARMS”也寻找Alma。
在这种情况下，无法抛弃失去记忆而困扰的Alma的小光披上了Alma结合的PARKER，被卷入了机械手臂们展开的大事件中…