2041, Earth. After being pulled into the planet's atmosphere, the fall of the Freeport Space Station has led to the "Great Cataclysm"—an event that devastated the Earth's environment. Left as a polluted wasteland, survivors go to war with their fellows to guarantee themselves resources; in the end, these scrimmages have erased the whole existence of humanity. Coincidentally, life still exists on a moon base. Although it is supposedly meant as an immigration outpost for the mission to explore Mars, it is soon turned into a city, both regulating and allowing its citizens to flourish. The lunar base, officially named "The City of Eden," holds the hope of fully colonizing the moon. Takeru, one of many citizens of Eden in the year 2267, participates in "Tube Races" between gangs and groups using hovercraft-like vehicles. Due to causing an accident in one of his races, Takeru is sentenced to complete volunteer work outside the city. While clearing his punishment, Takeru stumbles upon remains that may unravel the truth about Earth and Eden's genesis. [Written by MAL Rewrite]

In the near future, augmented reality has become a key part of daily life. A gentle middle school girl named Yuuko "Yasako" Okonogi and her family have just moved to Daikoku City despite rumors of people disappearing. There, her grandmother, nicknamed "Mega-baa," runs a shop called Megasia that specializes in illegal tools which interact with parts of the virtual world. Mega-baa also hosts an unofficial detective agency called "Coil," a group of children around Yasako's age who find and handle corruption of the virtual world. Yasako gets involved with the group when Fumie Hashimoto, a playful member of Coil, helps rescue her cyberdog Densuke after getting trapped in virtual space while chasing a mysterious virus. Also investigating these corruptions and viruses is an abrasive hacker named Yuuko Amasawa, who the others take to calling Isako. Can Coil discover the truths behind the mysterious viruses and corruption, and if they can, at what cost? [Written by MAL Rewrite]

New York City, the late 1920s. The battle with Nobunaga is over, the city restored to peace...until the owner of Little Lip Theater informs Shinjiro... "This time, the leading lady will be...you." Thus Shinjiro, disguised as the actress Petitmint, is forced into the role of "Cleopatra." The Star Division members set out to persuade a reluctant Shinjiro, beginning a chase across the five boroughs. Meanwhile, a dark-skinned youth and his servant have appeared unexpectedly in the midst of the flourishing city. His eyes, concealing a silent wrath, are fixed upon nothing less than the Statue of Liberty. Now Shinjiro and company must protect this city of hopes and dreams from a new menace while safely raising the curtain on a new show. (Source: ANN)

In a world where memories exist in memory chips separate from the body, death of the body no longer means death of the soul. It is possible for memories to be viewed, altered, and transferred between bodies. These memory chips are used by the rich to obtain eternal lives in carefully selected bodies, while for the poor, selling their own bodies and conserving their souls in the chips often become the only way to earn a living. An electrolytic cloud in the sky serves as a barrier between the heavens of the fortunate and the underworld of the destitute, making this social division impregnable. One day, a man named Kaiba wakes up in an empty room with no memories, a mysterious hole in his chest, and a locket holding the picture of an unknown woman. After escaping an attack and stumbling upon a decrepit village of underworld residents, he begins his adventure across the different planets of this strange universe to find out more about his own identity and the woman he once knew. Through a journey of self-discovery and acceptance, Kaiba weaves together tales of souls and spirits and explores the importance of memories. [Written by MAL Rewrite]