Tatsumiyajima is the central island in the middle of a small cluster of islands, in a sleepy backwater of the Japanese isles. Not much happens there, and the island's young people go to school knowing that their lives are likely to remain peaceful and undisturbed. Or so they have been taught... but the truth is different. The fate of mankind is on the line, and Tatsumiyajima is the last line of defense against a hostile and incomprehensible enemy. At the center of it all, fighting for Humanity's continued existence, is the giant robot Fafner, the dragon that guards this final treasure of mankind.

Hoping to unite their countries with an alliance, The Empress of Austria arranges her daughter, the delightful yet spoiled Marie Antoinette, to marry the crown prince of France, Louis XVI. Upon arriving in Versailles, the Austrian princess meets Oscar Francois de Jarjayes, Captain of the Royal Guards—a seemingly dashing young man—but to Antoinette's astonishment, he is in fact a woman! The youngest daughter of a noble family with a prominent lack of a male heir, Oscar was raised as a boy to continue the family's military legacy. Suffocated by the rigid rules associated with her new position and longing for companionship, Antoinette immediately takes a liking to this intriguing young woman, and wastes no time befriending her. However, as the childish new queen foolishly abuses her power, Oscar is conflicted between maintaining her loyalty to the royal family and addressing the growing concern of poverty among the common people. Recalling the events of the French Revolution, Versailles no Bara depicts the struggles of two women unjustly burdened by family expectations. Yet, despite being forced to deny their identities at the expense of personal happiness, they march on to become key players in the annals of history.

In the aftermath of a great and terrible war, Haruka finds herself the last surviving human on Earth. Though humanity may have been wiped out, she is not entirely alone. Advanced robots have survived the apocalypse, and Haruka lives with five who care for her: Spike, a boyish android who is very attached to her; Trigger, hot-tempered with a penchant for firearms; Cleric, the intelligent problem solver; Reeves, whose thoughtfulness overshadows his intimidating appearance; and Angela, a sword wielding recluse with an aversion towards humans. Residing in a high-rise building at the center of the city, Haruka lives a relatively peaceful life with her mechanical family. However, her life is far from a stable one. Not only is a lack of resources a concern, but violent, remnant robots from the war roam free, ready to destroy whomever they meet. Kurogane Communication follows Haruka as she tries to survive in an apocalyptic world while facing many dangers that will challenge her daily life.

Kannazuki no Miko begins in the village of Mahoroba, where time passes slowly for both man and nature. Two students from the village's prestigious Ototachibana Academy might as well be night and day. Himeko is shy and unassertive, while Chikane is bold and elegant. Despite this, they love each other, and nothing can come between them, no matter how hard they try. On the two girls' shared birthday, a sinister voice corrupts one of their friends into attacking them, and just when it seemed grimmest, the lunar and solar priestess powers that lay dormant in the two girls awaken, dispelling the evil. That was only the first hurdle, however. The two must now fend off the countless others who would threaten their well-being—even the people closest to them!