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 shook Japan to its very core. 
It's the EX-ARM that can turn people into bombs,
"وصعقت اليابان بأسرها، إنّها "إكس-آرم
القادرة على تحويل الناس لقنابل
El EX-ARM que convierte
en bombas a los humanos.
El EX-ARM que convierte
en bombas a los humanos.
capable de transformer
le corps humain en explosif.
grazie all'attacco terroristico suicida avvenuto 
l'altro giorno sul palcoscenico di questo Megafloat,
aquele que sacudiu o Japão, é o EX-ARM
que pode transformar pessoas em bombas!
Потрясший всю Японию Экс-Арм,
который превращает людей в бомбы.