In Sky Girls, human race had to resort to using weapons of mass destruction to win a war against an enemy known as Worms.
In Bokurano, during a summer camp, 15 children, 8 males and 7 females, find a working computers by the sea.
In Darker than Black, an inscrutable and abnormal territory, known as Hell’s Gate, appeared and caused Tokyo to lose its original sky.
In Tengen Toppa Gurren Lagann, Simon s recruited by an eccentric fellow orphan named Kamina into his group, the “Gurren Brigade”.
In Reideen, Junki as something else to pursue in life, to find his missing father.