The story revolves around Nikolai, apparently a part-cyborg; Galory, a young boy who apparently is part human/part Crest person, and Althea, who is entirely a Crest person. Seems the Earth and the Crest people were at war for 300 years so there's still a lot of bad feelings present. The ship Galory, Nikolai and others are on is ambushed and almost everyone killed by some kind of automated attack ships from a huge Crest ship that has been taken over by an automaton. Galory, Nikolai and Althea go to the ship to try and see if there are any survivors of an advanced party from Galory's ship that can be saved, and to see if they can destroy the Type 38 automaton in the ship's core.

The war between the Terrans and the Vers Empire of Mars has ended, allowing humanity to blissfully enjoy their lives in a time of peace. Nineteen months later, however, the Vers princess makes a shocking public declaration: "the Terrans are a foolish race that covets resources, destroys nature, and are devoted to the pursuit of pleasure." And so, to protect their precious Earth, she calls upon her knights to take up arms, and the raging battle between the two civilizations reignites. Slaine Troyard has found a place among the Martians, giving Earth a short respite from the war against the Vers Empire. However, a peaceful resolution seems inconceivable. The various people who fought desperately for survival in the past now find themselves in the midst of yet another bloody and chaotic conflict, one that will forever alter the fate of humankind.

Walküre and Delta Flight used music to save people from the Vár Syndrome, a previously unknown disease that made humans and others go berserk. However, they find themselves facing a new threat…

Fourth season of Date A Live. The story begins in the world of Eurasia, where a phenomenon known as a “spatial quake” causes the death of about 150 million people. 30 years after this tragedy, we follow our protagonist Shido Itsuka and the world is still suffering from these quakes, albeit they are much smaller. One day, Shido comes across a mysterious girl at ground zero of a spatial quake. From his adoptive sister, he learns the girl is one of the “Spirits.” Beings from different dimensions that cause these quakes. So Shido is tasked to seal these beings’ powers to save the world. But to do so, he must woo and kiss these girls. And thus begins the journey of our protagonist as he continues to increase his harem of superpowered girls who all try to take Shido for themselves.