Hetalia Axis Powers: Paint it, White!

The planet Pict launches a surprise invasion on Earth, with the goal of converting all humans into "Noppera" - creatures with featureless white skin, antennae, and no facial features. The world's nations are initially unable to coordinate a unified defense, allowing them to be easily defeated. Nations from both the Allied and Axis powers of the Hetalia universe are forced to put aside their differences and work together to counter the alien threat.