In the year 1989, the Japanese government passed the Media Betterment Act, allowing a group of soldiers known as the Media Betterment Committee (MBC) to destroy and censor any problematic media under the guise of protecting public morals. As a response, regional governments established the Library Defense Force (LDF), whose members take up arms and put their lives on the line to protect freedom of expression. At the top of the Kanto branch of the LDF stands the Library Task Force (LTF): an elite squad consisting of only the most exceptional fighters. As a high schooler, Iku Kasahara experienced the terror of censorship first-hand when she refused to surrender the newest volume of her favorite series to MBC agents. She only came out unscathed thanks to a lone member of the LDF, who protected her and her beloved book. Now in her 20s and still unable to forget the man who saved her, Kasahara joins the LDF in the hope of becoming just like her prince. But LDF training turns out to be far more rigorous than she could have imagined, and her instructor, LTF member Atsushi Doujou, seems fixated on making her life a living hell. Given her struggles, Kasahara is shocked when she is selected as one of the two new LTF recruits as a result of Doujou's recommendation. As Kasahara does all she can to become worthy of the LTF and unravel her enigmatic superior's motivations, she wages war—both on the battlefield and in her personal life.

Despite endless research, the human mind remains a mystery to this day. Unknown to the public, there exist special individuals who are able to dive deep into the minds of people and even manipulate their memories. Gifted with this ability, Hiroki, Tsukasa, and Satoru are among those who use their power to commit crime under the orders of their leader, Katsuragi. The three step into the dangerous territory of the human mind in order to destroy their assigned targets while striving to keep their own minds and memories safe.

During a winter long ago, near-immortal vampires began plaguing the world. As their population grew at an astounding rate, they promptly threw humanity off its place at the top of the food chain. Desperate to avoid extinction, the surviving humans concentrated in their last safe haven—a small city surrounded by an enormous wall. There, they have waged war against the vampires for many years. In the midst of a particularly brutal attack by the vampires, a human soldier named Momo encounters Fiine, the queen of their enemies. After seeing her try to save Momo's best friend from a rampaging vampire, Momo follows Fiine back to her house. It is there Momo connects with Fiine over their love for music and desire to escape the fighting. Pursuing that goal of escape, the two decide to journey toward a supposed paradise where humans and vampires coexist—despite being uncertain of its existence. However, Momo and Fiine are being targeted by both races, who they must first evade if they hope to reach their destination in one piece.

It is the Correct Century, two millennia after a devastating conflict which left the world broken. Earth is now mostly uninhabitable, and thus a remnant of humanity has resided on the Moon while the Earth and its few survivors recover. For years, the Moonrace, the people of the Moon, have continued to check if Earth is fit for resettlement. A boy named Loran Cehack and two others are sent down to Earth for a reconnaissance mission. Loran ends up spending a year on the planet working for the Heim Family, aristocrats living in a Victorian-like society. This family, like others of similar wealthy status, celebrates one's coming of age with a ceremony involving a giant stone statue known as the White Doll. To Loran's surprise, the Moonrace suddenly touches down on Earth with the intent of taking it by force. During the attack, the White Doll is broken apart, revealing a mobile suit called the Turn A Gundam inside. With Loran in its cockpit, the Turn A causes a standoff between the forces of Earth and Moon. The young pilot, along with the people of both sides, must keep the peace and avoid another all-out, catastrophic war.