2167 AD is shown to be devastated by a powerful electromagnetic shockwave. This is caused by a nearby star, Hydrus Beta, 20 light-years away, going supernova. The series itself is set 189 years later, in the year 2356 AD. Civilization has been rebuilt with humanity having united together to face the coming of the second shockwave of the supernova. The second shockwave, unlike the first, is to contain a great deal of matter composed of the remnants of the star itself.
In the town of Lindworm where monsters and humans coexist, Dr. Glenn runs an exemplary medical clinic for monster girls with his lamia assistant, Sapphee. Whether receiving a marriage proposal by a centaur injured in battle, palpating the injury of a mermaid, or suturing the delicate wounds of a flesh golem, Dr. Glenn performs his job with grace and confidence. But when an unsavory character seeks to steal a harpy egg, how will the unflappable Dr. Glenn respond...?
Tokonome Mamori is transferred to Mermaid - an artificial quarantine island for people with superpowers. When Mamori is attacked, a newly transferred girl named Mirei saves her. The enemy doesn't stop, however, and the two are soon cornered. Just when they think all hope is lost, Mirei kisses Mamori, and Mamori turns into a sword. Mirei then wields the sword and launches a counterattack against their enemies.
On a visit to his hometown, Souta Tawara meets a strange child who loves udon and frogs... and has ears and a tail?! Although ordinary at first glance, it turns out that this little tyke is actually a tanuki in a human disguise! So begins the tale of a gentle, warm, and slightly weird family in Kagawa prefecture, better known as "Udon Prefecture," where time passes at a less hurried pace than in the big city...
Tomoko Konagai is a first-year in high school and a shy girl. Tomoko owns three cats. The cheerful and live Munchkin Maa, the smart and responsible Russian Blue Rou, and the gentle crybaby Singapura Shii. Tomoko, whose only friends were her cats, one day becomes friends with Azumi Shiratori, who also loves cats.
Shiina Aki is constantly being treated like a girl due to his feminine looks so he decides to move to Tokyo to attend middle school in an attempt to change himself.
However what awaits him in his new home, Sunohara-sou, is the kind-hearted caretaker, Sunohara Ayaka. Along with the three female members of Aki's new middle school's student council, Yukimoto Yuzu, Yamanashi Sumire & Kazami Yuri.
And so begins Aki's new life in Tokyo living with 4 girls.
The Krakozhia Dukedom and the Grania Republic are at war, and high school student Sōhei Yano wants no part of it. But when two Lieutenants show up in tanks at his door, his life becomes an exercise in dodging stray bullets!
Ike is a powerful magician and the leader of the Immortal Brigade, part of the Seventh Corps of the Demon Lord’s Army. He single-handedly conquers fortresses and pushes back the armies of humanity. Neither Dairokuten, the Demon Lord, nor Ike’s loyal soldiers know his darkest secret—he is a human in hiding! But can he keep his secret safe and bring peaceful coexistence to demons and humans?
It's the closing years of the Taisho era, a turbulent time when the military empire of Japan is rising to go to war with the world. The protagonist, Hiiragi Kyoichiro, has come to the Imperial Capital, Tokyo, to attend Imperial University. He is determined to pursue a scholar's path and become a great man back in his hometown. But now the Japanese army has set its sights on Kyoichiro, because of a special ability that he possesses. As a result of a terrible illness from his youth, Kyoichiro gained the ability to see the spirits of the dead.
Maeda-san is living alone in rented accommodations for the first time after finding employment. In his tiny, no-bath apartment he is visited by Chie Satonaka, who looks like the little sister he never had, but turns out to be the landlord of this apartment building. Chie's high degree of competence when it comes to cooking and housework, sometimes makes her appear very much older than the middle school girl she actually is. Maeda-san's other neighbour, Reiko Shirai, quite jealously tries to guard the cute landlord for herself though. And so Maeda-san's otherwise uneventful life, supposedly living alone, suddenly becomes quite lively...
In most ordinary high schools, many stories and rumors float around—some scandalous, some happy and some...more macabre. One such example is of monsters lurking in an abandoned mansion outside of town. Such tales, however, prove too tempting to resist for Hiroshi and his friends Mika, Takeshi, and Takurou. They decide to brave the rumored dangers in order to investigate the manor and complete a test of courage. Each of them approaches the mansion with an overwhelming sense of dread. And when they enter, they come upon a blue monster named Ao Oni who attacks them.
As Hiroshi and his friends try to solve the various puzzles in the mansion and escape their new blue nemesis, they find themselves meeting several horrible endings as they fail miserably.
Ninomiya is an ordinary high school student who lives at home with his older sister Ryoko. However, Ninomiya's life ceases to be normal the moment a cute girl named Mayu descends into the middle of his school's campus in a military-grade helicopter. It turns out Ryoko sent this girl, along with her older brother Mikihiro, to live at the Ninomiya household.
The Blue World, which symbolizes reason, is under constant attack by the creatures called the Nightfly O'Note originating from the Red World, symbolizing instinct. Akira Asagi, the 17-year-old protagonist who is a researcher at Blue World, is nominated to lead the war at Ryuukyuu LAG, a proud defense facility on the islands of Ishigaki and Iriomote. She meets the sixth combat unit "IS," which was formed four years after a fierce battle that annihilated the fifth unit. Akari must lead these six riders, also called the Scared Rider Xechs, to fight against the other world while at the same time deepening the relationship among them.
The cramped town of Keiko-cho is stained black with factory exhaust and oil. Late one night, a piercing whistle echoes from some ruins in a seemingly empty corner of the town, accompanied by the eerie echoes of harsh words spoken in German. The sounds come from a group of nine boys dressed in the starched collars and caps of high school uniforms. There in the darkness stands a secret base built by these nine boys under the leadership of Zera, the "king of the ruins," known as the Light Club.
When Natsuno Hanabi went back to her hometown to study in high school, she thought that she will have a new wonderful life. But Tachibanakan, the dormitory she was going to live in, was not what she expected.