After being fugitives for a year, it's Nuku Nuku and Ryunosuke's first day at school; but Nuku Nuku's athletic feats have alerted Mishima Heavy Industries to their location, and they'll stop at nothing to capture the two.

Nuku Nuku and Ryunosuke head to the beach to enjoy themselves; Ryunosuke's mother tries to kidnap Nuku Nuku aboard a yacht using their friend Yoshimi as a hostage.

Akiko reaches a truce with Ryunosuke's father, Kyusaku, to live together in the same house with their children; the former CEO struggles to adjust to being a housewife, but things go sour when the chores leave her no time to spend with Ryunosuke.

A Mishima Heavy Industries aircraft crashes near Ryunosuke and Nuku Nuku's house, and they find a young girl inside; the girl, Eimi, begs them to protect her, but she has a hidden objective that requires sending Nuku Nuku to the scrap heap.

After destroying Ryunosuke's bike, Nuku Nuku decides to save money for a replacement and gets a job at a restaurant that happens to be owned by Akiko.

Mishima Heavy Industries develops a new satellite weapon that locks onto its targets until they are dead, and it seems like a boon for their business, until it accidentally locks onto Akiko.