AD. 2023, Tokyo. Because of the change of the society such as internationalization and enlargement of the trading, the dark side of the society also continues changing. The criminals are getting deep, and their organizations are increasing its size, then the peace and security is getting worse. The government takes it seriously, and decides to introduce an innovative system. In order to cope with the special criminals, an extralegal police is founded. It is a special criminal team, Warriors, which consists of a few elite members.
Two years ago, Shibuya was ravaged by a biological terrorist attack using the deadly Ua virus. Maria Osawa was saved when her father inoculated her against the virus, but is left with partial amnesia from the shock. She works as a cameraman when she reunites with a girl named Canaan in Shanghai, China. A gifted assassin with synesthesia, she is under orders from an unknown organization for a yet unspecified mission.
Ryūji Kisaragi is a normal high school boy whose peaceful life is turned into an adventure by the return of his second cousin Eriko Nanao. Ryūji and Eriko seize a relic box from a black broker, and in the box they find Rose, a red dragon girl. In order to protect Rose from the black organization, Ryuji decides to fight using his power as a relic handler.
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.
Katalina, a Lieutenant of the Empire, seeks to escape one of their airships with the experimental subject Lyria. An accident results in them landing on an island, where Lyria is discovered by Gran, a young local who has trained with the sword. As he fights off the Empire soldiers pursuing Lyria, he's eventually joined by Katalina. When the opposition becomes too fierce to handle, Gran dies at the claws of a hydra, only to be brought back to life by Lyria, who combines her effort with Gran's to summon a dragon that drives off the Imperial forces. Now Gran's life force is split with Lyria, so he must go where she goes. That's not a problem for him, since he was planning to go on a journey to seek out his absent father anyway.
The story follows Issei Hyōdō, a dim-witted, lecherous second-year high school student who is killed by a girl on his first date ever. Issei is reincarnated as a devil, and from that day forward, he serves as an underling of Riasu, a high-level devil who is also the prettiest girl on Issei's campus.
Inuyasha, Kagome, Miroku, Sango, Shippou and their nekomata friend Kirara, are now in the final leg of their quest to put an end to the elusive demon, Naraku and all of the chaos and evil he has caused, and to ultimately undo the unfortunate karma of the Jewel of Four Souls. Their journey, however, will not be easy as their remaining enemies put out all the stops to make sure that they do not accomplish their goal.
Commonly known as the "Dungeon," the city of Orario possesses a huge labyrinth in the underground. Its strange name attracts excitement, illusions of honor, and hopes of romance with a pretty girl. In this city of dreams and desires, new adventurer Bell Cranel has his fateful encounter with the tiny Goddess Hestia.
Thus begins the story of a boy striving to become the best adventurer and a lonely goddess searching for followers both hoping to reach their goals and perhaps have some romance on the side.
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.
Senō Natsuru is your normal, everyday high school student. However, he's been chosen to be a Kämpfer, who's objective consists on fighting other Kämpfer with either guns, swords or magic. However, there's catch—first, you can't chose if you're a Kämpfer or not, and second, you must have the body of a girl to use your powers.
Kanokon's story revolves around Kouta Oyamada, a young first-year high school student who moves from the country to the city and thus transfers to Kunpo High School. On his first day at his new school, a beautiful second-year female student named Chizuru Minamoto asks him to meet her alone in the music room. When he arrives, she reveals that she is in fact a fox deity and from that day on the two hang out together. Nozomu is a first-year female student at Kouta's school, she is in fact a wolf deity and in love with Kouta, and a rival of Chizuru for Kouta's affections.
Japari Park is a gigantic integrated zoo. In the zoo, due to the mysterious "sand star" substance, the animals start turning into human-shaped creatures called Animal Girls. Japari Park is a place where many people visit and have fun at, but one day a lost child wanders into the park. The lost child starts a journey to return, but because so many Animal Girls join in on the quest it becomes an unexpected grand adventure.
Shinichi Kanou is a young secluded Otaku who is offered a job thanks to his vast knowledge of anime, video games and manga and just after meeting his new employer, he is kidnapped, awakening in an alternate world with a fantasy setup. Shinichi then is informed that he was in fact selected by the Japanese government to help improve his country's relations with this new world by establishing a company to spread the unique products of the Japanese culture to this new, unexplored market.
Gene Starwind and his partner Jim Hawking run a small business on the backwater planet of Sentinel III. But all that changes the day that Hilda hires them for a bodyguard job. Now, thrust into a mystery they don't fully understand, they're on the run from the cops, the pirates, an angry alien, and a mysterious assassin. But they've got one thing going in their favor—they have the galaxy's most advanced ship, the Outlaw Star.
Lain Iwakura appears to be an ordinary girl, with almost no experience with computers. Yet the sudden suicide of a schoolmate, and a number of strange occurrences, conspire to pull Lain into the world of the Wired, where she gradually learns that nothing is what it seems to be... not even Lain herself.
Set in the Shinigami technical school for weapon meisters, the series revolves around 3 groups of each a weapon meister and a human weapon. Trying to make the latter a "Death Scythe" and thus fit for use by the Shinigami, they must collect the souls of 99 evil humans and 1 witch.
Kraft Lawrence, a 25 year old peddler travelling from town to town selling and buying various things to make a living during a period much like Europe in the Middle Ages. One night when stopped at the town of Pasroe, he finds in his wagon a 250 year old pagan wolf deity girl named Holo. She appears to be that of a 15 year old girl, except for a wolf tail and ears. She introduces herself as the town's goddess of harvest who has kept it blessed with good harvests of wheat for many years. Despite having the responsibility to watch over the town, she wants to go back to her homeland in the north called Yoitsu, she believes the people have already forsaken her anyway and that she has kept her promise to maintain the good harvests. She manages to bargain her way out of the village by making a deal with Lawrence to take her with him. As they travel, her wisdom helps increase his profits, but at the same time, her true nature draws unwanted attention from the church.
The year is 1939 - it was then that the Neuroi appeared. Nobody knows where they came from or what their ultimate agenda is, but the fact remains that their attacks drove people out of their towns and cities. In order to take arms against them, humanity develops a new anti-Neuroi weapon called the "Striker Unit." Using the power of magic to fight against the monsters, this new device enhances and amplifies the power of female magic-wielders. To use this device, young witches from all over the world have been brought together to form an elite task force unit called the 501st Joint Fighter Wing, commonly known as the "Strike Witches."
After discovering that Neuroi are capable of communication with humans and making peace with the nest above Gallia, the Witches squads are now on a mission to re-establish communication when the Neuroi completely vanish after a sudden attack. It is then that they discover a new massive nest that just appeared covering almost all of Europe. Ruthless and without mercy it annihilates allied forces along with many Witches. Word of the attack reaches Fuso and a support battalion is deployed to rescue the survivors. Among the rescue team is the former Striker captain Sakamoto Mio and the now civilian Miyafuji Yoshika who wants to save her dear friends.
Valkyrie, Kazuto, Akina, Hydra and friends are back for more when the Key of time suddenly appears along with many other mysterious happenings. All seemed to be linked to a person named 'Valkyrie Ghost' who's only goal is stealing Kazuto for herself. As they team up against this seeming unbeatable foe they dig deeper into the mysterious past of Valkyrie's home planet, Valhalla.
The third season doesn't have a particular story behind everything (like "Valkyrie Ghost" in the second season). It just tells 6 stories about the life of Kazuto & Co. with some additions: Raine and Chorus get a house on earth, the last three Valhalla princesses each get an episode, and in the last episode Kazuto and Valkyrie, who in the same episode managed to stay adult, try to marry again.