A-ko and B-ko are bounty hunters in an untamed world. When a young heiress, C-ko, falls out of the sky and into their hair, they find themselves battling space pirates and galactic police. Turns out the high-pitched, hungry C-ko holds a secret—the spirit of an ancient evil—and is the center of a plot to destroy the universe!

Senkuu has made it his goal to bring back two million years of human achievement and revive the entirety of those turned to statues. However, one man stands in his way: Tsukasa Shishiou, who believes that only the fittest of those petrified should be revived. As the snow melts and spring approaches, Senkuu and his allies in Ishigami Village finish the preparations for their attack on the Tsukasa Empire. With a reinvented cell phone model now at their disposal, the Kingdom of Science is ready to launch its newest scheme to recruit the sizable numbers of Tsukasa's army to their side. However, it is a race against time; for every day the Kingdom of Science spends perfecting their inventions, the empire rapidly grows in number. Reuniting with old friends and gaining new allies, Senkuu and the Kingdom of Science must stop Tsukasa's forces in order to fulfill their goal of restoring humanity and all its creations. With the two sides each in pursuit of their ideal world, the Stone Wars have now begun! [Written by MAL Rewrite]

Eleven-year-old Sara Werec's elder brother, Ralph, was sent to the frontlines of an interstellar war 130 light years away, and Sara vowed to reunite with him one day as a comrade. Five years later, Sara is a student at Grapera Space Armed Soldier Academy, training to become a Reasoner, a pilot of an advanced weapons system called a "Strain." When the academy is suddenly attacked by enemy forces, Sara enters battle against a Strain that quickly overpowers her. After incapacitating her, the pilot reveals himself to be her Ralph. Killing all the other students and destroying the school, he disappears, leaving Sara to question everything she has ever known. Soukou no Strain is the story of Sara as she reenters training under a new name, now determined to confront her brother and make sense of her brother's actions. [Written by MAL Rewrite]

Kai, who has powers different from the rest, together with his sickly sister Hikaru was protected by an organization called ASHURUM. Scouted by Eiji, Kai was delegated to the ASHURUM special force AESES and undergo intensive training. Whenever he was free, Kai visited Hikaru at the hospital belongs to the organization, but Hikaru's condition never improved. So, one year later, with amazing growth from the intensive training, Kai decides to escape from the organization. (Source: ANN)