An EX-ARM auction is organized by an individual who calls themselves "Auctioneer." Criminal groups from all across the world flock to the Megafloat hoping to get their hands on them.

The Counter Squad is asked by the government to investigate the auction undercover as the bodyguards of Jinkokusha, the leading group in the Japanese underworld. They are immediately dragged into an inter-group conflict, and Akira loses consciousness in combat. When he wakes up, he's greeted by Auctioneer.
and the highest bidder for each EX-ARM 
will go home with it.
وسيحصل المزايد الأعلى لكلّ "إكس-آرم" عليها
Die Ex-Arms werden an den
jeweils Höchstbietenden verkauft.
et les EX-ARM reviendront à ceux
qui auront proposé le meilleur prix.
Si aggiudicherà ciascuna Ex-Arm
 chi avrà proposto il prezzo più alto!
e entregarei os EX-ARM
aos maiores lances.
Участник, который предложит высшую цену,
уйдёт вместе с Экс-Арм.