The Keroro Platoon finally stops pretending invasion is a joke. Earth is actually ending, and four amphibious idiots are the only ones who notice, let alone care enough to do something about it. The largest-scale battle in franchise history proves that even the laziest comedy show can earn its apocalypse.
The Keroro Platoon has settled into Earth life so completely that their invasion mission feels like ancient history. They spend their days lounging and causing minor chaos, barely remembering why they came to this planet in the first place. Everything changes when strange phenomena start erupting across the country. Cryptic symbols appear everywhere, and the incidents escalate with alarming speed. Suddenly faced with a genuine threat to Earth itself, the frog soldiers snap to attention. This isn't the leisurely occupation they've grown accustomed to. Now they have to decide whether they'll protect the planet they've come to call home, or watch it crumble while they watch from the sidelines. As the mystery deepens and the danger multiplies, Keroro and his crew discover this crisis might be connected to their very presence on Earth. The largest battle in the platoon's history unfolds against the clock, forcing each soldier to confront what being an invader really means when the stakes have never been higher.