Alien refugees have come to Earth. They call themselves 9-Lives. Humans call them cat-boys, and force them to live as collared pets. Conri, a rebellious young 9-Life, ran away to escape this fate. But when a human named Adrian saves him from capture, Conri is torn between his desire for freedom and another desire he can't quite admit, even to himself... Can two people meet as equals in a world divided between masters and slaves?

A contract marriage?! Satsuki has gone to England to study acting, but it's all he can do to pay his living expenses. Just then, the handsome Count Edward offers him money in exchange for entering a fake marriage! If Edward isn't married by his next birthday, he will lose most of his assets. The two start out awkwardly, but gradually grow attracted to each other. But then a misunderstanding leads Edward to grow jealous, and he forcibly embraces Satsuki!

In a dystopian future, AEGIS paints a picture of the love and friendship between orphans Jino and Izare. Having gained independence from Revro, the earth secretly trains an army of boys. Jino and Izare are abandoned to the camp, and Izare silently sacrifices himself to keep his promise to Maria that he'd look after Jino. Jino escapes the soul-killing cruelty of the camp while Izare remains to become an ultimate weapon.

On earth, Jino is discovered by the resistance, who demand that he join them. Above earth, Aegis intelligence also discovers Jino, known as deserter 3-A-527, and Izare contemplates tracking and killing Jino. The boys' mysterious "sister," a powerful figure in Aegis Command, goes to earth and destroys the resistance members who menace Jino.

Jino and Izare's happiness at being adopted by the same parents is short-lived. They are thrust from the warm arms of new family into the desolate and de-humanizing training camp AEGIS. Izare's life is illuminated through a series of childhood flashbacks. What truths were hidden in the identity of Izare and Jino's "sister," those many years ago? Were Jino's anguished attempts to teach Izare to stand on his own successful? Was he able to keep his promise to protect Izare?

Izare often offends his squad, but Jino, his former foster brother, continues to defend him. But not even Jino can tolerate Izare's behavior anymore when he finds out that Izare killed their beloved sis - although he doesn't know that Izare killed her in accordance with her own wishes.

The mounting chaos Izare and Ray Lee face in space makes its descent to earth's surface as fighting between AEGIS, the Lexy, the people of Revro and The Resistance escalates when Lexy declares all-out-war against AEGIS. Izare's efforts to keep Jino safe by becoming the ultimate weapon seem to be for naught when Ray Lee hacks into U.S. military defenses and uses them against the people of earth to get at AEGIS.

The mounting chaos in space descends to earth's surface the as fighting between AEGIS, the Lexy, the people of Revro and the resistance escalates. Izare's efforts to keep Jino safe by becoming the ultimate weapon seem to be for naught when Ray Lee hacks into U.S. military defenses and uses them against the people of Earth to get at AEGIS.

In the future, a new society lives on a distant star. Ruled by a computer system named Jupiter, men are divided into classes based on their hair color. The Blondies, genetically altered by Juipter, are the highest class and occupy the capital city of Tanagura. Those with black hair, Mongrels, are forced to live in the slums, Ceres. Iason, the leader of the Blondies, encounters Riki, a mongrel, in the streets of Ceres one night and sets out to own him...

One night five years ago, Riki was wandering through the pleasure district of Midas when he found himself in a rather dangerous situation. As a consequence, Iason, the genetically engineered elite "blondie," has given him such levels of humiliation and unwanted pleasure that Riki's mind is still haunted by it. But Riki can't see the trap set to crush whatever is left of his pride that survived even his growing up in the slums.