
eBook by Reki Kawahara
One month has passed since Akihiko Kayaba's deadly game began, and the body count continues to rise. Two thousand players are already dead. Kirito and Asuna are two very different people, but they both desire to fight alone. Nonetheless, they find themselves drawn together to face challenges from both within and without. Given that the entire virtual world they now live in has been created as a deathtrap, the surviving players of Sword Art Online are growing desperate — and desperation makes them dangerous to loners like Kirito and Asuna. As it becomes clear that solitude equals suicide, will the two be able to overcome their differences to find the strength to believe in each other, and in so doing survive? A retelling of the Sword Art Online saga that starts at the very first level of the deadly world of Aincrad.

One month has passed since Akihiko Kayaba's deadly game began, and the body count continues to rise. Two thousand players are already dead. Kirito and Asuna are two very different people, but they both desire to fight alone. Nonetheless, they find themselves drawn together to face challenges from both within and without. Given that the entire virtual world they now live in has been created as a deathtrap, the surviving players of Sword Art Online are growing desperate — and desperation makes them dangerous to loners like Kirito and Asuna. A retelling that starts at the very beginning of Kirito and Asuna's epic adventure, on the very first level of the deadly world of Aincrad.

Having cleared the first and second floors of Aincrad at great cost, Kirito, Asuna, and the rest of the players ascend to the third floor. Tenuous new allies await them — most crucially Kizmel, an elven knight who soon reveals herself to be far more than a minor NPC. With new allies come new complications. The elves of the vast third-floor forest are no more united than the players who have just arrived there. The intrigue deepens when a mysterious figure challenges Kirito, and what begins as a simple contest of skill may actually be something far deadlier.

Having said their good-byes to the elven knight Kizmel, Kirito and Asuna set their sights on the fourth floor of Aincrad — only to find the way forward blocked by a powerfully flowing river. The updated fourth floor has become a water world, its town navigable only by gondola. Getting one will involve confronting an eight-meter-tall beast of flame, and that's only the beginning of the difficulties the fourth floor has in store.

「……別にこれ、デートとかそういうんじゃないからね」 自身の仮想体(アバター)の死が現実の死となるデスゲーム《ソードアート・オンライン》に閉じ込められて二ヶ月弱。攻略の最前線であるキリトとアスナは第五層へと到達していた。迷路のような街並みと極端に自然が少ない《遺跡エリア》で、二人は遺物拾いをこなしながらアイテムやコルを稼いでいく。一度第四層に戻り、ダークエルフの城主ヨフィリスからクエスト報酬をもらったのち、キリトは街の地下墓地で発生する小規模なクエストのクリアを提案する。アスナも賛同するが、それが彼女の不幸の始まりだった。

これはゲームであっても、遊びではない──。 無数のパズルギミックと死の罠が待つ《アインクラッド》第六層にキリトが挑む。《黒ポンチョの男》との危険な邂逅を経て第五層を突破したキリトとアスナ。奇妙な同居生活を送ることになった二人が次に挑むのは、《パズル》だらけの第六層。二大ギルドの均衡を揺るがす強力なアイテムの扱い、扇動PK集団の脅威、連続クエスト《スタキオンの呪い》。数々の問題を抱えながらも、二人は先に待つ悪意に満ちた罠を知らずに進む。

《アインクラッド》第六層で、黒エルフの騎士・キズメルと久方ぶりの再会を果たしたキリトとアスナ。彼女をパーティーに迎え、第三層から続く《秘鍵》回収クエストに挑む二人だが、その行く手には予測不能の展開が待ち受けていた。 AIを凌駕する感受性を備えたNPCたちの登場。《秘鍵》を狙うフォールン・エルフの暗躍。新たな展開を見せるクエスト。そして《扇動PK集団》の魔手。キズメルたちNPCをも巻き込んだ狡猾な罠を退けて、キリトとアスナは第六層を突破できるのか。

The seventh floor of Aincrad is a massive casino — the floor where over half the game's beta testers dropped out before launch. Kirito was among the many who lost everything in its Battle Arena back then. When an informant named Argo the Rat entices Kirito and Asuna with knowledge that could aid their investigation, the pair plunge into the casino's dark underbelly once more. Meanwhile, the "Elf War" quest reaches a sudden turning point when a flurry of crises rock the dark elves' home.
