In Victorian-era London, on the night of Ciel Phantomhive's tenth birthday a fire destroyed his manor and killed both of his parents. In a moment of death Ceil strikes a deal with a demon, his soul in exchange for revenge. This demon becomes his butler and calls himself by name of Sebastian Michaelis, to protect and serve Ciel until the deal has been completed. One month after the fire Ciel returns from being missing, with his new butler Sebastian. Ceil is now the head of the Phantomhive corporation, handling all business affairs as well as the work as the Queen of England’s guard dog and looking for his parents murders.
Humanity has successfully colonized all the planets in the Solar System, with intentions to continue into new frontiers. Individuals live stable lives in these colonies, including young high school students living in 4th Tokyo on Mars. Two of these students are Iris Shirazaki and Mizuki Sera. Iris is finishing her last year of high school while studying to be a test pilot while her friend Mizuki also works as a mechanic on the aircraft. Her own brother, Kaito, oversees Mizuki and Iris as their homeroom teacher and program director.
Mina Tepeş, the Princess of the ancient covenant and ruler of all vampires, wants her race to stop hiding from the humans. Using her vast wealth, she has paid off Japan's entire national debt and by doing so, gained the right to create a district off Japan's coast that is to become the future haven to vampires worldwide. But when she finally attempts to make public the existence of vampires to the world some politicians, terrorists and rival factions are plotting to assassinate Mina before she has a chance to get Japan's and international recognition for the Vampire Bund. Now she must rely on her strength, cruelty and those closest to her, while trying to make a normal life.
Eleven years after the introduction of internet-connected, augmented reality eyeglasses and visors, Yoko Okonogi moves with her family to Daikoku City, the technological center of the emerging half-virtual world. Yoko joins her grandmother's "investigation agency" comprised of children equipped with virtual tools and powerful metatags. She quickly crosses paths with Yoko Amasawa, an expert hacker of the virtual environment, as Amasawa relentlessly seeks to "unlock" the mystery of a computer virus that emerges from an inaccessible corrupted space.
Ash is a student at Ansalivan Dragon Academy, attended by children who have formed contracts with dragons. He possesses the "star mark," the sign of a contract, but since his partner hasn't been born yet, he seems insignificant. The awakening of the dragon he's raising inside his body is triggered by an incident, and it emerges in the form of a young girl.
Satoru Fujinuma is a struggling manga artist who has the ability to turn back time and prevent deaths. When his mother is killed he turns back time to solve the mystery, but ends up back in elementary school, just before the disappearance of his classmate Kayo.
A gate appears in Tokyo's Ginza district sometime in the 21st century. From the gate pours out monsters, knights from middle-age Europe, and other fantasy-like beings, and they kill many of the citizens of Tokyo. This event is known as the Ginza Incident. The government sends a small group of soldiers from the Japanese Self-Defense Forces to the alternate world beyond the gate. Led by otaku soldier Yōji, they find that the villages in the world are being attacked by a dragon. An elf girl who is a survivor from the dragon's rampage joins the group in their travels across the dangerous new world.
Dreaming of becoming a hero and vanquishing the Demon King, Raul Chaser enters the Hero Training Program in pursuit of his ambition. However, when the Demon King is defeated and peace returns to the world, the Hero Training Program is suspended indefinitely, making it impossible for anyone to become a hero.
Two years later, Raul reluctantly works at a small electronics store called Magic Shop Leon. Though the former hero-in-training is plagued by the mundanity of working in retail, everything changes with the arrival of a new hire. Appearing at first to be just a boy with good looks, "he" turns out to be a female demon by the name of Fino Bloodstone. She is not just any old demon either—Raul's new coworker is in fact the daughter of the late Demon King! Handed the responsibility of training this eccentric new employee, Raul soon finds his life becoming livelier than it ever was before.
Asano begins work as the housekeeper for the old family of Shimazu, where he meets the ill-mannered, selfish, beautiful Sakaya. She is actually the 37th head of the Shimazu family in charge of sealing away monsters with Spirit Archery. Discovering that he has the powers of "true names" and "true eyes,"Asano becomes wrapped up in Sakaya's battle with the monsters as her assistant.
Yūki Ōjima attends Takafuji Private Academy, a large school with over 6,000 students, where he is a member of the Food Research Club along with seven others, including his childhood friend Chisato Sumiyoshi. The members leisurely spend their time in the club doing very little. When the election for the next student council president comes up, the front runner Satsuki Shinonome proposes that clubs which have no merit should be sorted out and abolished. The Food Research Club seeks advice from the current student council president, Yakumo Mōri, who suggests that Yūki run in the election as an opposing candidate. Yūki learns about the issues facing the school and decides to run in the election.
Kinjirō Sakamachi has gynophobia (fear of women), due to his violent mother and sister. Subaru Konoe is the butler of his classmate, Kanade Suzutsuki, and has to dress as a male due to butlers having to be men. When Kinjirō discovers Subaru's secret, Kanade promises to cure Kinjirō of his phobia. Kinjirō and Subaru are forced due to circumstances to spend time together and defend Subaru's secret while trying to cure Kinjirō's fear.
At private Mihama Academy, five girls who seem normal attend the school due to "certain reasons." A sixth student "with reasons" named Yūji Kazami transfers in. Yūji has an ego with such darkness that he does not fade in comparison to the five girls, who are so different from the norm. As they each meet each other, they deepen their understanding of one another. Through the small bits of progress they make, each of their hearts will be affected. When Yūji arrives, a story of girls who are trapped by their pasts begins.
At first glance, Arashi Mikami appears to be a normal, albeit socially awkward, 17-year-old high school student. He's actually part of a secret vigilante organization known as Black Label, a group dedicated to executing power-hungry criminals the law refuses to deal with. However, taking down a crime lord isn't always an easy task, and there are bound to be consequences for any action...
This is the action-packed story of the trials of Arashi and the people close to him.
In 2018, humans and wizards live together in Tokyo. Police continue to protect order in society, but wizards are tried according to magical law, in special courts defended by wizard barristers. At age seventeen, Cecile has just become the youngest wizard barrister, and begins work at the Butterfly Law Offices. While she hasn't realized it yet, she has tremendous magical potential.