Arima Takuya is a young student whose father, a historian who has conducted various researches, disappeared recently. During a summer vacation Takuya receives a peculiar package from his missing father, along with a letter containing information about the existence of various parallel worlds. At first Takuya doesn't take it seriously, but soon he realizes that he possesses a device that allows him to travel to alternate dimensions. Is his father alive, after all? If so, where is he?
The story takes place in a world where people continue their war against the "unknown"—the enemy of humanity. Children who have been evacuated to a cold sleep facility during the invasion by the "unknown" several decades ago wake up from their slumber and learn that their bodies developed some supernatural forces. In order to protect the country from the "unknown" emerging from the Tokyo bay gate, the boys and girls wage battles in the defense the cities of Tokyo, Kanagawa, and Chiba.
When the Pillars suddenly appear on Earth, threatening all life, it's only the act of the god Odin that offers humanity salvation. Providing a means of fighting back, he gives Earth the Valkyries, young female pilots with supernatural powers and spirit fighter planes. These skilled troublemakers, all young, risk their lives in a long-running war—but the final battle is fast approaching!
Everything about college student Amamiya Yuuhi is average: grades, looks and his blasé outlook on life. So what happens when he awakens one day to a talking lizard, who informs him that there is a gigantic hammer in outer space, poised to split the Earth into pieces, and requests his allegiance in the fight against the forces of evil? Pretend it never happened! Unfortunately for Yuuhi, a little bit of coercion in the form of a super-powered princess prevents him from returning to his mediocre life-as-usual.
In the adventure of his lifetime, Yuuhi will join forces with the unpredictable princess and seek out a motley crew of companions to fight back against an evil mage and his horrifyingly powerful homunculus before the Biscuit Hammer destroys the planet!
The aftermath of a mysterious environmental catastrophe has left the land in complete desolation! While mankind has been able to rebuild the city, the catastrophe has caused some humans to undergo genetic mutations granting them special powers and abilities. These genetically enhanced humans are known as Alters. Kazuma has spent his entire life in the wastelands relying on his special powers to survive, but when a secret organization called ‘Holy’ threatens to take away his freedom, he will be left with a choice to join or die. His fight to seek the truth behind the ‘Holy’ will rage and consume humanity and Alter alike!
Ayano Hanesaki, a first-year student at Kanagawa Prefectural Kitakomachi High School, has a badminton ability able to surpass others effortlessly yet avoids playing the sport. She meets Nagisa Aragaki, a third-year student who practices day and night aiming to become the best player in Japan. Encouraged by coach Tachibana Kentarou, supported by club colleagues, and fired up by various rivals, the two engage in their youth and adored sport so thrilling like a shuttle flown at high speed!
The story revolves around a highschool boy named Niwa Makoto. He lives with his aunt's family since his parents are away on business. It is there where he meets his mysterious cousin of the same age Touwa Erio — who happens to tie a futon mattress 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.
A very powerful industrialist directs his daughter to pick a husband from three candidates he has chosen for her. They are to come into her life, and their uniqueness would cause her to recognize them immediately. All three of the candidates are outstanding. Well, it’s actually four...
The story evolves along the lines of a power political mystery involving a small middle eastern country.
Sudou Kaname, an ordinary high school student, receives an invitation email to try a mysterious app called "Darwin's Game." Kaname, upon launching the app, is drawn into a game where players fight one another using superpowers called Sigils. Without knowing the reason for all this, can Kaname survive furious battles against the powerful players who attack him?
Kagami Sakamori was one of the top players in the VRMMO Ark Earth Online as Danblf, a veteran summoner with the gravitas to match his elite status. When he falls asleep playing one day, he's transported to a world where the game is reality—but instead of his all-powerful avatar, he's stuck in the body of a cute young girl! He can't let anyone know that this little cutie is really Danblf, so he takes the name “Mira” and claims to be Danblf's disciple. If this gets out, he'll never live it down!
In an alternate universe, shy, awkward Yuki Nagato attempts to court her crush, Kyon, with the help of her best friend and neighbor, the perky and indomitable Ryoko Asakura. Together, the trio defends their high school literature club from extermination…and from the pestering of their over-the-top classmate Tsuruya and her friend and minion Mikuru.
Every 12 years, mercenaries with the highest caliber of brute strength, cunning wit, and deadly precision gather to participate in the Zodiac Tournament. Each warrior bears the name and attributes of one of the 12 animals of the Chinese zodiac. With their pride and lives on the line, they engage in vicious combat until only the victor remains.
Long, long ago, there existed a world of magic and science. But having both powers was making people conceited and lazy. So God split the world in to the world of science, Erde (German for Earth), and the world of magic, Phandavale. One day in Phandavale, a terrible witch named Cendrillon revives. Cendrillon plots to rule both worlds, and searches for the "key of Erde" and the "key of Phandavale" which holds tremendous power.
A young boy from Erde by the name of Sōta meets a mysterious girl from Phandavale, Akazukin (Red Riding Hood), and her talking wolf companion, Val. Sōta learns that he is the key of Erde. Now it is up to Akazukin, Val, and the other Musketeers, Shirayukihime (Snow White) and Ibara (Sleeping Beauty) to protect Sōta from Cendrillon and her Nightmarians who wish to obtain the power he mysteriously possesses.
Hinako lives alone by the sea, quietly drifting through life after losing her family years ago. One day, a mermaid named Shiori saves her from a monster and says she’s come to eat her—just not yet. Until then, Shiori will stay by her side and keep her safe. In that moment, a deep hope swells in Hinako: Maybe this girl can finally grant her the ending she’s been waiting for.
Kimito Kagurazaka is an ordinary high school boy who is kidnapped by an elite young lady's academy to be a "sample of the common people." The school is full of sheltered girls who have never met male peers before.
A pair of adopted siblings run a rental shop in old Edo where fire and flooding is prevalent and everyday items are rented out to not impede when they flee. Mixed in the inventory are old objects that have turned into spirits after hundreds of years of existence called, Tsukumogami.
There is a certain restaurant in the first basement level of a multi-tenant building in one corner of a shopping street near the office district. The historical restaurant, marked by a sign with a picture of a cat, is called "Western Cuisine Nekoya." This restaurant looks completely normal through the week, but on Saturdays, it opens in secret exclusively to some very unique guests. During these hours, doors in various areas of a parallel world open to allow customers of many different races and cultures into the restaurant.
One night, a strange object falls on the head of Nitta, a member of the yakuza. Inside the box is a strange young girl named Hina. She has tremendous supernatural powers, and Nitta finds himself reluctantly taking her in. Her powers can come in handy for his yakuza business, but he also runs the risk of her using them on him! Not to mention, if she doesn't use her powers, she will eventually go berserk and destroy everything around her. Nitta and Hina's strange life together is just beginning...
When a giant robot suddenly attacks the city, a high-school student named Aoba is saved by a classmate who's piloting her own mecha. After accepting an offer to join the alliance she's is a part of, Aoba is thrust into the middle of high-flying robot warfare.
Iride Akatsuki and seven other charismatic game streamers wake up in the world of a mysterious free-to-play game called Naka no Hito Genome. Now they are competing in real-life games with life-or-death stakes, but clearing several game tasks could earn them 100 million lives.