Akira has returned alive after defeating Beta, but soon Tokyo is targeted by a large-scale hacking attack. He dives into the network along with Ygg's clones to figure out the cause, and fights the enemies within, but in the meantime the hacking spreads to the entire world.

It takes over military bases and fires a volley of ICBMs, seeking to destroy the entire world. In order to save humanity, Akira makes a decision born of love.
Akira, I'll leave my two daughters 
and mankind's future to you!
!أكيرا-كن، سأترك ابنتاي ومستقبل البشريّة لك
Akira-kun, meine Töchter und die Zukunft
der gesamten Welt liegen in deinen Händen.
Akira, te confío a mis hijas
Akira, te confío a mis hijas
Akira, je te confie mes filles,
Akira, ti affido tutto delle mie figlie
Akira, deixo minhas duas filhas
e o futuro da humanidade com você.
Акира, я отдаю тебе двух своих дочерей
и вверяю тебе будущее человечества.