With Dereputa and Targate dead, Monsu Doreiku decides put an end to the Gosei Angels' interference once and for all by removing all the oxygen from the planet before telling the residents of Earth they have a day until they are exterminated. After Datas pinpoints his location, the Gosei Angels confront Monsu Doreiku and unable to defeat him he spares them to live long enough to see the end of the world. Overhearing them as they learn about Monsu Doreiku, Nozomu starts to lose hope as Alata tells him that it will all work out before the Gosei Angel head to Monsu Doreiku's location. Though having troubles breathing, the Goseigers battle Monsu Doreiku while Nozomu gets Yuuta and the others to continue their soccer practice. Unfazed by the Gosei Dynamic, Monsu Doreiku eats a Bibi Bug to assume a giant form and reveals the rest of his plan: Having Buredoran pilot the Indevader, storing Earth's oxygen in it, on a direct course with the planet to cause a massive explosion. The Goseigers form Gosei Great to fight Monsu Doreiku while Mystic Datas Hyper tries to stop the Indevader, both having zero success as Monsu Doreiku removes the Headders from the fight. All seemed hopeless until the Goseigers summon all the Headders, disabling Monsu Doreiku as Hyper Gosei Great is formed and destroy both him and the Indevader in one hit. Soon after, with Earth's oxygen level restored and everyone's memory of the catastrophe erased, the Gosei Angels return home.