Academy City is a highly developed place in terms of technology. It is said to be 20 to 30 years ahead of the rest of the world. Eighty percent of its 2.3 million residents are students. The focus of studies here is directed towards esper powers. Misaka Mikoto, one of the top level espers in town, shares a room with Kuroko Shirai, another high level esper who is a member of Judgement, a law enforcing agency composed of students. Both attend to Tokiwadai, a private school reserved for the high-leveled and the rich. Kuroko's partner at Judgement, Kazari Uiharu, is a low level esper who studies at Sakugawa middle school. Her best friend and classmate there is Ruiko Saten, a level zero (no esper powers). Together, the four encounter several adventures in the exciting scientific town.
Mikoto Misaka, one of the strongest Level 5 espers in Academy City, gave her DNA map to a certain doctor when she was young, believing that it may be used for greater good. Unfortunately for her, it ended up being used to create countless clones of herself; forming the Misaka network, in order to create the strongest esper by sacrificing these clones whom she considers as her own sisters.
Several hundred years ago, humans were nearly exterminated by giants. Giants are typically several stories tall, seem to have no intelligence, devour human beings and, worst of all, seem to do it for the pleasure rather than as a food source. A small percentage of humanity survived by enclosing themselves in a city protected by extremely high walls, even taller than the biggest of giants. Flash forward to the present and the city has not seen a giant in over 100 years. Teenage boy Eren and his foster sister Mikasa witness something horrific as the city walls are destroyed by a super giant that appears out of thin air. As the smaller giants flood the city, the two kids watch in horror as their mother is eaten alive. Eren vows that he will murder every single giant and take revenge for all of mankind.
Spike Spiegel, a bounty Hunter with a dark past, lives on bounty to bounty, barely making it each time, or not making it at all. His partners Jet Black, Faye Valentine, Ed and Ein the dog all help him in his adventures from planet to planet.
The Japanese Ministry of Defense has an anti-paranormal special forces group called the Paranormal Disaster Countermeasure Headquarters. They're the ones responsible to protect Japanese soil and its people from supernatural and paranormal events. However, things didn't go so well in one of their missions, which leads to intervention by the Ministry of Enviroment's Supernatural Disaster Countermeasures Division after the PDCH has sustained large numbers of casualties battling demons.
Gabriel White graduated at the top of the class at angel school and attends a human school on earth in pursuit of knowledge, but then gets engrossed in a web game and decides its too much trouble to go anywhere.
Zero is a witch who is ignorant of the world and travels with a half-beast half-human mercenary who longs to be human. Witches who practice sorcery exist in the world, however, in this era no one knows how about the art and study of witchcraft. Zero is going on a journey to search for a magical tome called "The Book of Zero" that hides a power that can destroy the world. The mercenary travels with her as her guard.
Hotaro Oreki doesn't like to do things that he considers a waste of energy. However, things start to change when he enters high school because even though he does not want to join any non-compulsory school activities, his older sister requested that he join the memberless Classic Literature Club so that it won't get abolished. Unbeknownst to him, another student, Eru Chitanda, already planned to join; but instead of being free from club obligations, Hotaro eventually joined as he is strangely unable to refuse or escape from Eru's passionate gaze of curiosity. Together with his friends Satoshi and Mayaka, they began to discuss a variety of mysteries in school that only H?tar? seems to be able to solve, including the mystery that lingered on from Eru's childhood memory.
A girl aiming to become an idol named Uzuki Shimamura is informed that she has been accepted into the Cinderella Project, a new project that collects girls and polishes them to become idols. After meeting Rin Shibuya, Mio Honda, and the other eleven fellow members of the group, the girls begin their journey at the 346 Pro talent agency, overcoming many trials and hoping to one day stand on the same stage as their senior idols.
Tetsuo Takahashi is a teacher working at Shibasaki High School and specializing in the physiological studies of demi-humans. His students include Hikari Takanashi, a vampire and lover of tomato juice; Kyōko Machi, a dullahan; and Yuki Kusakabe, a yuki-onna. The school also employs math teacher Sakie Satō, a succubus.
It's the final year of high school for Yui Hirasawa (guitar), Ritsu Tainaka (drums), Mio Akiyama (bass), and Tsumugi Kotobuki (keyboard). The founding members of the Light Music Club. Together with their junior member Azusa Nakano (guitar), they spend their days after school in the music room enjoying tea and sweets, and practicing music. Amidst band practice, preparations for the new student orientation performance, scouting for new members, and student responsibilities they still have time for "After School Tea Time".
An art student named Jin Mikuriya carves a statue from the wood of the Kannagi tree only to have the statue come to life in the form of a goddess, who has now taken over the statue. He and "Nagi" work together to destroy the impurities that are gathering in the town.
Asahioka Branch School, a combined elementary and middle school in an isolated village, has only five students total, four girls and one boy. The girls are best friends, and pass the season with traditional activities like harvesting mountain herbs and fishing.
With just five students (none in the same grade ), the four girls of the tiny Asahioka Branch School still enjoy watching cherry blossoms, playing in rivers, digging potato, and building igloos together. The pace is very slow yet enjoyable and heartwarming.
High school sophomore Yuki Hase noticed that Kaori Fujimiya, his classmate, was always alone. He tried to start a conversation with her but was turned down: "My memories of friendship can last only a week," she said. Despite of knowing this shocking truth, Yuki keeps trying to be Kaori's "new" friend every week.
The year was 1970s. Fascinated by the performance of rakugo master Yakumo the 8th at a philanthropic show in a prison, delinquent Kyoji visited Yakumo immediately after serving his term, begging Yakumo to take him in as an apprentice. To his surprise, master Yakumo agreed without much hesitation, yet things progressed not quite as Kyoji expected.
In another dimension the Devil King Sadao is only one step away from conquering the world when he is beaten by Hero Emilia and forced to drift to the other world: modern-day Tokyo. As "conquering the world" are the only skills the Devil King possesses - and are obviously unnecessary in his new situation - he must work as a freeter to pay for his living expenses.
Meiro-chō is a town where all-female diviners (uranaishi) live and where girls from all over the country yearn to become the top diviner — "Urara." Today, a solitary girl named Chiya enters the town's gates. However, she has another purpose coming here, besides becoming the Urara. Chiya's days as an apprentice diviner begin as she meets three friends — the earnest Kon, Kōme who is a fan of Western culture, and the shy Nono.
Enter Sentan, a lush, tranquil island encased in war between the military and those with Hiruko, known as X'amd. On one of these warlike days, Akiyuki Takehara heads off to school and gets caught in a raid by the creatures. Through a series of events he is transformed into a X'amd, and with the help of a Tessikan woman Nakiami along with his highschool friend Haru, Akiyuki is forced to learn to live with the Hiruko or faces the danger of losing his self-control and turn to stone.
Right after starting middle school, Akari Akaza joins the Amusement Club which is composed solely of her two childhood friends, Kyouko Toshinou and Yui Funami. Chinatsu Yoshikawa, Akaza's classmate, becomes a member after finding out about the dissolution of the Tea Club. The Amusement Club, situated at the tea room facility since the Tea Club disbanded, has no clear purpose, being free for the girls to do whatever they want.