Mecha-Ude: Mechanical Arms

Kita-Kagami City is a pretty normal town... except that some people have gotten their hands on Mecha-Ude: powerful, sentient mechanical beings attached to the limbs of their hosts. When middle school kid Hikaru accidentally activates Alma, a mysterious Mecha-Ude with no memory of his past, he forms an unlikely connection with the talking arm. But...