The story of the anime Sword Art Online

In 2022, a Virtual Reality Massively Multiplayer Online Role-Playing Game (VRMMORPG) called Sword Art Online (SAO) is released. With the NerveGear, a helmet that stimulates the user's five senses via their brain, players can experience and control their in-game characters with their minds. This new VRMMORPG is a big hit as it was developed by Akihiko Kayaba, the man who also invented the NerveGear. On November 6, 10,000 players log into the SAO's mainframe cyberspace for the first time and discover that they are unable to log-out. They quickly discover that they must beat the bosses guarding each of the 100 floors of Aincrad, a steel castle which is also the setting of SAO, battle their way through, and reach the last, 100th floor of the game if they wish to be free. Those who suffer in-game destruction or remove the NerveGear out-of-game will result in their real-life deaths.

One of the players, Kazuto "Kirito" Kirigaya, is one of the 1,000 beta testers in the game's previous closed beta. With the advantage of previous VR gaming experience and a drive to protect other beta testers from discrimination, he isolates himself from the greater group and plays the game alone, bearing the mantle of "beater", or "beta tester" and "cheater". As the players progress through the game Kirito eventually befriends a young girl named Asuna Yuuki, forming a relationship with and later marrying her in-game. After the duo discover the identity of Kayaba's secret ID Heathcliff in SAO, who was playing as the leader of the guild Asuna joined in, they confront and destroy him, freeing themselves and the other players from the game.
In the real world, Kirito discovers that 300 SAO players, including Asuna, remain trapped in their NerveGear. As he goes to the hospital to see Asuna, he meets Shouzou Yūki, Asuna's father, who is asked by an associate of his, Nobuyuki Sugou to make a decision, which Sugou later reveals to be his marriage with Asuna, angering Kazuto. Several months later, he is informed by Agil, another SAO survivor, that a figure similar to Asuna was spotted on a giant tree (known as "The World Tree") in another VRMMORPG cyberspace called Alfheim Online (ALO). Assisted in-game by his cousin Suguha "Leafa" Kirigaya and Yui, a navigation pixie, he quickly learns that the trapped players in ALO are part of an evil plan conceived by Sugōu to perform illegal experiments on their minds. The ultimate goal is to perfect mind-control for financial gain and to subjugate Asuna, whom he intends to marry in the real world, to assume control of her family's corporation. Kirito eventually stops the experiment and rescues the remaining 300 SAO players, foiling Sugōu's plans. Before leaving ALO to see Asuna, Kayaba, who has uploaded his mind to the Internet using an experimental and destructively high-power version of NerveGear at the cost of his life, entrusts Kirito with The Seed – a package program designed to create virtual worlds. Kirito eventually reunites with Asuna in the real world and The Seed is released onto the Internet, reviving the VRMMORPG industry.
Soon after, at the prompting of a government official investigating strange occurrences in VR, Kirito takes on a job to investigate a series of murders involving another VRMMORPG called Gun Gale Online (GGO), the AmuSphere (the successor of the NerveGear), and a player called Death Gun. Aided by a female player named Shino "Sinon" Asada, he participates in a gunfight tournament called the Bullet of Bullets (BoB) and discovers the truth behind the murders, which originated with a player who participated in player-killing in SAO. Through his and Sinon's efforts, two suspects are captured, though the third suspect, Johnny Black, escapes.
Kirito is later recruited to assist in testing an experimental FullDive machine, Soul Translator (STL), which has an interface that is far more realistic and complex than the previous machine he had played to help develop an artificial intelligence for the Shino "Sinon" Asada (MOD) named A.L.I.C.E. He tests the STL by entering a Virtual Reality cyberspace created with The Seed package, named UnderWorld (UW). In the UW, the flow of time proceeds a thousand times faster than in the real world, and Kirito's memories of what happens inside are restricted. However, Black critically injures Kirito with suxamethonium chloride but the MOD recovers Kirito and places him back into the STL to preserve his mind while attempts are made to save him.

Tokoh-tokoh Sword Art Online :

Kirito (キ リ ト?)
     Surname: Kazuto Kirigaya (桐 ヶ 谷 和 人 Kirigaya Kazuto?)
     Sounds by: Yoshitsugu Matsuoka
     Kirito is the protagonist in this story. He is a player "solo" and also beater (abbreviation for beta-tester and cheater), players who do not join the guild and party and have always worked alone. Kirito is one of the top-player in the SAO capable of solving their own boss stage. Kirito is the one sword "Elucidator" and always wore a black robe and was given the nickname "The Black Swordsman" (黒 の 剣 士 Kuro no Kenshi?). Kirito has skill "Dual Blades" He is only enabled when emergencies only so as not to create a furor because he has unique skills.

 

Asuna (ア ス ナ?)
    Surname: Asuna Yuuki (結 城 明日 奈 Yuki Asuna?)
    Sounds by: Haruka Tomatsu
    Asuna is the heroine in this story. He was a friend Kirito and deputy chairman of the guild "Knight of Blood", which is not too large guild that has about 30 players, and also called the strongest guild in Aincrad. He is one of the few female player in the SAO, and more than that he is so beautiful, she has received numerous invitations and a declaration of love. He is a talented player who was given the nickname "Flash" (閃光 Senko?) For superb sword skills. KoB had given her two bodyguards, one had been defeated by Kirito.

    SAO name in the same as the name in the real world. Later he fell in love with Kirito and they were married in the SAO. In real life, he lived under very heavy pressure, he was forced to participate in the expectation of both parents. He lives in a way that has been determined by his parents and never get out of the way. But after going to the SAO and met with Kirito, he began to show his emotions back and realize that this is life. She is a girl with a very strong willpower, able to sacrifice hours of sleep to raise the level. Love Kirito Asuna and Kirito who was the reason for Asuna to continue SAO.

Yui (ユ イ, Yui?)
     Surname: «Yui-MHCP001» (Mental Health Counseling Program 001)
     Sounds by: Kanae Ito
     Yui is the son of Kirito and Asuna. He actually is an Artificial Intelligence (AI). He was found in the forest floor 22 when Kirito and Asuna were strolling. At first, Asuna Kirito assumed ghosts and eventually rescued. When Yui wake up, suddenly he called Kirito as "papa", while Asuna "mama". That's the origin of the call, finally Kirito and Asuna him as a child.

Leafa (リ ー フ ァ, Rifa?)
    Surname: Suguha Kirigaya (桐 ヶ 谷 直 葉, Kirigaya Suguha?)
    Sounds by: Ayana Taketatsu
    Suguha is the sister Kirito. Actually, not a younger sibling Suguha Kirito. Rather, cousins ​​Kirito. Suguha are girls that are almost the same as Asuna, but Suguha a cute girl. Suguha expert in kendo (a kind of typical Japanese fencing), to the extent that won several trophies for his skills. Just like Kirito, Suguha including students who are smart in school. Suguha also secretly liked Kirito which is his own brother, and sometimes became irritated when he heard complaints about Asuna Kirito. In ALO, he is a player with a race Sylph (one name fairy races in ALO) with the name "Leafa" (リ ー フ ァ, Rifa?) And play party together Recon (Shinichi Nagata, one of his friends). When met Kirito, Suguha / Lyfa not know that Kirito was her own brother. Kirito is to know that his own brother, he was shocked. However, he accepted the fact and begin to repair itself.