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.
Season Fairies create and control the weather using special musical instruments. They make the wind blow, the snow fall, the sun shine; if it's something weather related, they are the ones who make it happen. Sugar, an apprentice Snow Fairy, and her friends Salt and Pepper, all want to become full-fledged Season Fairies, and the only way to achieve this is to search for and find the "Twinkles" that will make their magical flowers bloom. The only problem is that none of them have any idea what a Twinkle is. They enlist the somewhat unwilling help of Saga, a human girl who can see Season Fairies. Much to her annoyance, Saga's perfectly planned and ordered life has just become a little too lively for her taste. Together, they search for the mysterious Twinkles while trying to perfect their magic.
Futaba is a girl who was in love with a boy named Kō Tanaka in middle school. However, after a misunderstanding, their relationship as friends ends when he transfers schools over summer vacation. In high school, her world is turned around once again when she meets Kō again, this time under the name of Kō Mabuchi.
Four boys named Haruka, Makoto, Nagisa and Rin all participated in a swimming tournament shortly before graduating elementary school and later parted ways. Years later, they reunite when Rin challenges Haruka to a race and wins. Not wanting to be defeated so easily, Haruka gathers Makoto and Nagisa and a new recruit named Rei to form the Iwatobi High School Swimming Club.
The boys of summer are back. Haru, Makoto, Nagisa, Rei, and Rin are reunited and the competition is about to get fierce. After the last swimming meet, the bonds of friendship have only gotten stronger, and with each passing day the boys continue to grow. This summer brings new rivals and new challenges.
Makoto Niwa is a high school boy who, since his parents are away on business, lives with his aunt’s family. It is there he meets his mysterious cousin of the same age Erio Touwa—who happens to tie a futon around her upper body and is a self-proclaimed alien. Her staple food is pizza. Erio had been missing for half a year and was found floating in the sea. She doesn't remember anything about what happened during that period of time, but she began to think that it was the act of an alien and wanders the neighbourhood wrapped in the futon.
Isei finds new troubles about to enter into his life and two even sleeping in his bed. While looking at an old photo album of Isei's, Kiba sees a familiar sword being held by an old friend of Isei's, which reopen's old wounds. Meanwhile, Devils, Fallen Angels, and The Church's agents all clash to get their hands on, or just destroy, powerful weapons called Holy Swords. If that weren't enough, Isei's red dragon warns him that he senses his old rival the white dragon is drawing near.
Haruhi is a poor tomboyish student at a school for the ultra-wealthy, able to attend because of a scholarship, and unable to even afford a uniform. One day, she stumbles across the decidedly peculiar but very popular Ouran Host Club. She tries to leave, but accidentally breaks a vase, and unable to pay for it, she's told that she'll have to stay and do odd jobs. That is, until they decide she would be more valuable as a club member. Not realizing she's female due to her appearance, they fix her up and give her a male uniform. She's an instant hit, so they decide to have her keep up the charade even after they find out the truth. Haruhi, being average almost to a fault, doesn't know what to make of the unconventional activities of the Host Club (or of the even more unconventional members), but having little choice, she plays along. Before long, real bonds are formed, friends made, and Haruhi finds herself accepted in a way she could never have been otherwise in this affluent school.
Oz Vessalius, heir to one of the duke houses, has just turned fifteen. His life is rich and carefree, darkened only by the constant absence of his father. At his coming-of-age ceremony, however, everything changes. For no reason that he can discern, he's cast into the prison known as the "Abyss", only to be saved by a "chain" known as Alice, the bloodstained black rabbit. It is unknown why was he cast into Abyss, how does Alice factor into it all, and what does the organization known as "Pandora" want with him.
Due to poor grades, Tsukune Aono, an average high school student, has been unable to get accepted into any private academy of his choice. By exceptional accident, the only school to accept him turns out to be anything but ordinary; the school is attended by youkai disguised as humans. Fearing for his life, he attempts to escape only to meet Moka Akashiya, a beautiful girl who just happens to be a vampire. Despite this, Tsukune decides to stay at the academy, hiding his human nature from students and teachers. Tsukune also discovers that when the rosary around Moka's neck is removed, her true nature emerges.
A new semester has arrived for Tsukune and the gang featuring a handfull of girl obsessed female first years and it seems like among these first years emerges another vampire who holds a grudge against her sister Moka. What shall this grudge lead to in the future and shall Tsukune suceed in taming this new problem child into his friend, no one knows what the future holds.
Nanami Haruka wants to be a song writer, so she attends an idol training school filled with handsome boys. The school pairs each aspiring songwriter with an aspiring idol, but Haruka finds herself paired with 6 bishounen idols. To make things more difficult, Nanami is also not allowed to date any of her beautiful partners.
When Nanami Haruka entered the master course she is faced with an even more difficult time. The main six members of Starish are assigned new seniors to help train them, but the seniors are not quite having the best attitudes about it
Walkure Romanze's story revolves around Takahiro Mizuno, a student studying at an academy with jousting as its main focus for sport. Takahiro acts as an advisor to the riders of the sport. Takahiro goes through each day tediously until the time of the annual competition draws near. Due to some odd circumstances, his childhood friend Mio Kisaki is enrolled into the competition. As she has never even rode a horse once in her life, Takahiro senses the fear in his friend and becomes Mio's coach.