The story takes place in Tokyo in 2039, after the outbreak of the "Apocalypse Virus" during what became known as the "Lost Christmas" of 2029. Since then, Japan has been under the control of the multinational organization called GHQ.
Ouma Shu is a 17 year-old boy who mistakenly obtains a rare and great power. He can use this power, "The Right Hand of the King," to extract "voids," or tools/weapons that are the manifestations of peoples' hearts.
He has been rather shy since a childhood tragedy, but both his personality and life change forever when he meets a girl named Yuzuriha Inori, a member of the rebel group called "Undertakers," whose members seek the restoration of self-government in Japan via the ousting of GHQ.
Light Yagami is an intelligent young adult who resents all things evil. He also wishes to end crime in the world and create a utopia in which he reigns supreme. His life undergoes a drastic change when he discovers the Death Note.
The school romantic comedy revolves around a second-year high school student named Sorata Kanda who lives in Sakurasou, the dormitory for problem children at Sorata's school. One day, Mashiro Shiina - a cute girl who happens to be also a cosmopolitan, brilliant artist - moves into Sakurasou.
Sorata thinks to himself that he should protect Mashiro from the weirdos at Sakurasou, but Mashiro has a surprising secret: she has no idea how to take care of herself. She gets lost if she goes out, and her room is a complete mess. Sorata's dorm mates designate him as the "master" of Mashiro, and thus, an ordinary boy and a brilliant girl must live like "a master and his pet."
Itsuka Shido is a high school boy. On the last day of the spring holidays, an explosion destroys the town and a girl in armor appears in front of him. Shido's sister-in-law, Kotori, tells him that the girl is called "Special Disasterous Designated Creature: Spirit", which causes a timespace quake. Kotori disclosed that she is the commander of the anti-spirit organization Ratatosk and orders him to go out on a date with the spirit girl. Kotori says, "I don't ask you to beat the spirit. Just let her fall in love with you and save the world."
Devil King Sadao is only one step away from conquering the world when he is beaten by Hero Emilia and forced to drift to the other world: modern-day Tokyo. As "conquering the world" are the only skills the Devil King possesses—and are obviously unnecessary in his new situation—he must work as a freeter to pay for his living expenses!
By its eleventh expansion pack, the massively multiplayer online role-playing game Elder Tale has become a global success, having a following of millions of players. However, during the release of its twelfth expansion pack: Novasphere Pioneers, thirty thousand Japanese gamers who are all logged on at the time of the update, suddenly find themselves transported inside the game world and donning their in-game avatars. In the midst of the event, a socially awkward gamer called Shiroe along with his friends Naotsugu and Akatsuki decide to team up so that they may face this world which has now become their reality along with the challenges which lie ahead.
Natsu the Fire Dragon Slayer and Lucy Heartfilia with the rest of the guild of Fairy Tail causing trouble around the Magic World.
In the year 2022, the Virtual reality Massive Multiplayer Online Role-Playing Game (VRMMORPG) Sword Art Online (SAO) is released. With the Nerve Gear, a VR Helmet that stimulates the user's five senses via their brain, players can experience and control their in-game characters with their minds. But an unexpected event occurs on November 6, 2022 when Akihiko Kayaba, the creator of SAO, prevents the players from logging out. Akihiko issues them a challenge; if they wish to be free and log out of the game, they must reach the 100th floor of the game's tower and defeat the final boss. However, if their avatars die in the game, so will their bodies in the real world. As the game's 10,000 players try to accept their new deadly predicament, Kirito, a skilled player who tested the beta version of the game, is determined to reach the 100th floor and attain freedom.