As the game Sword Art Online is released thousands of eager gamers log in to test out the game.
Though it does not take long until the games notice a strange thing, they can't log out.
Kirito attends a meeting where it is revealed that a player named Diabel has found the first floor boss. Diabel asks the members there to form parties of six, but Kirito decides to form a party with a female player called Asuna.
After saving a small guild called Black Cats Kirito is asked to join them and help train their only female member, Sachi.
Kirito saves a crying young girl named Silica from some gorillas, and decides he will help her revive her pet dragon who just died, by taking her to a place on Level 47.
As Asuna and Kirito is having dinner at a restaurant they hear screams outside and become witnesses to a player being killed within the walls of a town, something thought to be impossible. They immediately decide to investigate exactly what happened.
Kirito and Asuna continue to investigate the death inside the walls, something thought to be impossible.
Kirito wants a new sword and goes to a swordsmith by the name of Lisbeth. She does not have a sword that he wants, but they head out in search for a material that can make the kind of sword he wants.
While trying to sell a very rare meat Kirito gets a visit from Asuna, so he asks her if she would cook it for him and she agrees. Later, while having dinner they make plans to go to the dungeon the following day.
Asuna's bodyguard is however not at all pleased about the plans.
After clearing the dungeon Kirito and Asuna arrive at the boss room, but as soon as they see the boss they realize they will not be able to defeat him alone.
When Asuna informs her guild leader Heatcliff that she will be taking a break from the guild he is not pleased. He calls a meeting with Kirito and Asuna where he challenges Kirito to a duel, if Kirito wins, Asuna can take a break but if he looses he has to join the Knights of the Blood Oath.
After getting married Kirito and Asuna takes a break from the guild, moves to level 22 and buys a cabin there. One day while walking in the forest they meet a young girl without any memories.
Kirito and Asuna are asked by Yulier, the second-in-command of the army, to help rescue the army leader from a secret dungeon.
One day while out fishing Kirito meets a man called Nishida, Kirito invites him home to dinner where he asks Kirito to help him catch the biggest fish he has ever seen. While trying to catch the fish Kirito receives a message from Heathcliff, he wants them to return to the front lines.
Everyone continue their fight against the most dangerous boss yet, The Skull Reaper.
After being sent a picture of someone who looks like Asuna, Kirito visits Egil's bar to find out where the picture was taken.
After Kirito saves Rifa she agrees to help Kirito go to the World Tree to rescue Asuna.
When Leafa decides to take Kirito to the World Tree her party members are not pleased and confronts her.