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.
Kagami successfully revives Hikaru, but he lets his guard down for a second and his body is taken over by Fist, who had obtained Ordela's powers. Hikaru rises again in order to get Kagami's body back. Alma vs Fist... How will this battle between brothers end?
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