The story is set in Areishia Spirit Academy, where girls from noble families are educated to become spirit contractors. A boy named Kamito, a male spirit contractor whose existence was believed to be impossible, accidentally peeps on a girl named Clair while she was bathing and forms a contract with the spirit she set her sights on. In order to make up for his mistake, Kamito must become Clair's contracted spirit.
In Tokyo, an impenetrable field known as "Hell's Gate" appeared ten years ago. At the same time, psychics who wield paranormal powers at the cost of their conscience also emerged. Hei is one of the most powerful of these psychic agents, and along with his blind associate, Yin, works for one of the many rival agencies vying to unlock the mysteries of Hell's Gate.
Sōji is an ordinary high school student with an extraordinary love for pig tails (or "twin tails"). One day a mysterious girl from another universe named Thouars appears in front of him. At the exact same time, monsters begin attacking the city where Sōji lives, declaring they will drain the world's energy in the name of the Twintails. Sōji receives a powerful armor from Thouars called "Tail Gear" which transforms him into a female Twintail warrior named Tail Red.
High School freshman Kōtarō Satomi wants to start a new life living alone in the tiny Room 106. That lonesome life is immediately broken by the invasion of a group of mysterious girls who all claim Room 106 belongs to them one way or another.
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.
As a soldier of Brune, Count Tigre of Alsace was sent to war against Zhcted. Although Brune outnumbers Zhcted, the presence of the 7 War Maidens of Zhcted completely turned the tide to their favor due to their battlefield strength, tactical superiority and magical weapons. Count Tigre was captured and became the prisoner of War Maiden Eleonora, but fate might just be smiling upon him and Alsace through this incident.
Tokiha Mai and her sickly younger brother, Takumi, have received a scholarship to attend the prestigious Fuuka Academy. On the way, the ferry they are travelling on becomes the site of a destructive battle between two girls wielding apparently supernatural powers. This is only the beginning of their troubles, as Mai learns that she herself possesses these powers - the powers of a HiME.
Masamune Makabe was mercilessly teased for being overweight as child, especially by a girl named Aki Adagaki. Masamune decides to get his sweet revenge by transforming himself into an attractive, intelligent, and athletic young man. After many years honing his new persona, he transfers to Aki's school in hopes of finally getting his long-awaited vengeance.
A young boy named Ash Ketchum embarks on a journey to become a "Pokemon Master" with his first Pokemon, Pikachu. Joining him on his travels are Brock, a girl-obsessed Rock Pokemon Trainer, and Misty, a tomboyish Water Pokemon Trainer who may have a crush on him. Ash and Co. end up traveling through various regions, including Kanto, the Orange Islands, and Johto, and then enter the Pokemon League competitions there. Along the way, they run into many confrontations with Jessie, James, and Meowth, a trio of Pokemon thieves who are apart of an evil organization called "Team Rocket". But everytime Team Rocket try to do their evil deeds, they fail thanks to Ash and his Pokemon.
A girl named Mitsuki Kanzaki lives with her step-brother Yuya after her mother remarries. One day, Mitsuki is possessed by the self-proclaimed spirit of a young girl, Hiyori Kotobuki. Hiyori (in Mitsuki's body) must fall in love with Yuya to move toward the "Gates of Heaven."
Sword princess Aiz Wallenstein. Today, once again, the strongest female swordsman heads to the giant labyrinth known as the "Dungeon" along with her allies. On the 50th floor where mysteries and threats such as a decayed dragon's corpse that crumbles to ash and an irregularity that creeps ever closer to the party loom, Aiz calls for the wind and heads deeper into the darkness of the Dungeon. Eventually, she finds herself meeting a boy for the first time. "Um, are you OK?" In the Labyrinth City of Orario, the contrasting stories of the boy and the girl intersect!
Yōto Yokodera is a perverted schoolboy who is unable to express his true feelings freely. After hearing about the wish-granting Stony Cat, he decides to try and make an offering to lose his facade, only to meet Tsukiko who wishes instead to be more discreet with her feelings to become more adultlike. Who'd have thought the rumors of the wish-granting Stony Cat turns out to be true; transferring the facade that Yōto wishes to lose into a classmate who needs it more and making it difficult for Tsukiko to show even the slightest of emotions on her face. Being on the same boat, they both search for ways to remedy the situation.
Six months ago, the five-member literature club all awakened superpowers. Unfortunately this has not led to them having anything else interesting happen in their lives, like epic battles or saving the universe. They go about their ordinary lives, just happening to have superpowers, waiting for the call to battle to finally happen - assuming it ever comes at all.