|Spoiler Alert: This article or section contains details about plotlines not covered in the anime. Do not proceed unless you wish to be spoiled. |
Alicization Lasting (アリシゼーション・ラスティング, Arishizēshon Rasutingu?) is the 18th book in the Sword Art Online light novel series, published on August 10, 2016. It is the fourth volume in the War of the Underworld sub-arc of the Alicization arc, as well as the final volume of the Alicization arc.
"------ It's Kirito-kun. My Kirito-kun, came back......"
On the second day of the Final Tolerance Experiment, the entire Underworld has plunged into chaos. The Dark Territory Army, led by Dark God Vector, are the users from the «real world»......
Deceiving VRMMO players from America, China and Korea, he summons tens of thousands of «Dark Knights» into the «Underworld» as reinforcements. Since Integrity Knight Bercouli, the highest commander of the «Human Empire Army» has fallen, Alice, his beloved apprentice, rushes towards the «World End Altar» on her own. Losing the Super Account «Dark God Vector», Gabriel logs in again as «Subtlizer», defeats Sinon in their duel, and pursues Alice.
Meanwhile, in the battlefield where the «Human Empire Army» is trapped by the «Dark Knights» overwhelmingly outnumbering them, the desperate fights of Asuna and the help of Lisbeth, Sakuya and others turn out to be in vain. Eventually Kirito is captured by the enemy in his state of self-loss.
As his rival since the SAO era, the enemy is «PoH», one of the remaining members of Laughing Coffin. As though releasing all the grudge accumulated for years, «PoH» is about to sink his fangs into Kirito---!! Suddenly, from Kirito's heart, a voice resonates. It belongs to his best friend whom he has lived with, fought alongside with and laughed together with. The voice of his one and only one, best friend---.
Finally, Kirito revives.In order to save Alice, who determines the fate of the world, Asuna, who is his best love, everyone else who rush in to help, and «everything» living in the Underworld.