Released as a special to Japanese Sword Art Online: Ordinal Scale anime Blu-ray Disc limited edition. The grand event of the duel featured the two «Unique Skill» wielders: the «Dual Blades» vs. the « Holy Sword». Kirito accepted Healthcliff’s challenge under the conditions that Asuna will be released to him if he wins, and joining the «KoB» if he loses. The match proceeded with each other whittling one another’s life-span, with varying chances that the winner can be either one. The match ended with Kirito’s loss, as «the Living Legend» performed an impossible move in which he moved at a speed that momentarily broke the game. Episode 15 - Episode 16 - Episode 17 - Episode 18 - Episode 19 - Episode 20 - Episode 21 - Episode 22 - Episode 23 - Episode 24 - Episode 25 Released via Sword Art Online Material Edition: Assemblage under the title "Sword Art Online Gaiden X2: There is But One Ultimate Way".

The volume contains three side stories that take place either in Sword Art Online or ALfheim Online. It was revealed that Asuna was monitoring the map while waiting within the KoB headquarters. Asuna and Kirito reported to Heathcliff about the incident, and temporarily left the guild with his permission. As Kirito did not want to be alone at the moment, he carelessly told Asuna that he wanted to be with her that night, which led to a comical chain of events that drew some attention to an interesting option on their virtual menu screen called «Moral Code Removal». After some time, Kirito finally unveiled his feelings to Asuna, and then he made his proposal to her for marriage.Now in the second year of the North Centoria's Imperial Sword Mastery Academy, Kirito and Eugeo were working their way up to the top of the Academy's ranks to be given the right to participate in the Norlangarth North Empire Empire Swordsmanship Tournament and, later, the Four Empires Unity Tournament. However, after a certain incident midterm, they both ended up breaking the Taboo Index and were arrested by an Integrity Knight, who turned out to be Alice, with no memory of her life in Rulid. After escaping the Axiom Church's jail and an encounter with another Integrity Knight, they were saved by the world's Cardinal, which had taken the form of a human avatar and no longer in control of Underworld. From her, Kirito learned the secret of the Axiom Church and its immortal ruler, Quinella. Kirito and Asuna were discussing each other’s taste in clothing until Kirito noticed the movement of numerous flashing green cursors on his virtual scanner. The two of them hid themselves behind the trees, under Kirito's coat, as they watched the 12 players from the guild «The Army» march past. Asuna then informed Kirito about the change in behavior of «The Army». Both feared that «The Army» might try the suicidal task of challenging the yet to be discovered boss of the 74 th Floor with no knowledge of the boss and with just 12 members. After the battalion moved past them, the two headed into the Floor's Labyrinth. Agil and Klein's Exciting Meal - Breaking the Damage Limit (2012) - Bluish Memories (2021) - Defensive Power (2015) - SAOP 4.1 (2016) - Summer Memories (2019) - The End of the Summer and the Straw Hat (2018) Kirito awakens to find himself lost in a new world. With the realistic world and his "lost" memories with this world, he questions his own identity and his existence in the world he used to know and the world he is currently in. He soon finds out that this is a virtual world with the name " Underworld", and pursues to find the truth about this world and the objective of Rath for making this realistic world. Released as a special to Japanese Sword Art Online: Alicization – War of Underworld anime Blu-ray Disc volume 8 limited edition. A sequel to "If You Wish It".

With these conditions, the huge castle had been steadily conquered for two years. The current front line is the 74th Floor. Inside, there were a couple of large cities along with countless small scale towns and villages, forests and plains, and even lakes. Only one stairway linked each floor to another, and the stairways existed in dungeons where large numbers of monsters roamed; so discovering and getting through was no easy matter. However, once someone made a breakthrough and arrived at a city of the upper floor, the « Teleport Gates» there and of every cities in the lower floors would be connected making it possible for anyone to move freely through these levels.

Volume 01 - Volume 02 - Volume 03 - Volume 04 - Volume 05 - Volume 06 - Volume 07 - Volume 08 - Volume 09 - Volume 10 - Volume 11 - Volume 12 - Volume 13 - Volume 14 - Volume 15 - Volume 16 - Volume 17 - Volume 18 - Volume 19 - Volume 20 - Volume 21 - Volume 22 - Volume 23 - Volume 24 - Volume 25 - Volume 26 - Volume 27

Episode 01 - Episode 02 - Episode 03 - Episode 04 - Episode 05 - Episode 06 - Episode 07 - Episode 08 - Episode 09 - Episode 10 - Episode 11 - Episode 12 - Episode 13 - Episode 14 - Episode 15 - Episode 16 - Episode 17 - Episode 18 - Episode 18.5 - Episode 19 - Episode 20 - Episode 21 - Episode 22 - Episode 23 - Episode 24 - Episode 25 - Episode 26 - Episode 27 - Episode 28 - Episode 29 - Episode 30 - Episode 31 - Episode 32 - Episode 33 - Episode 34 - Episode 35 - Episode 36 - Episode 37 - Episode 38 - Episode 39 - Episode 40 - Episode 41 - Episode 42 - Episode 43 - Episode 44 - Episode 45 - Episode 46 - Episode 47The Hero" Kirito (Kazuto) has completed and exited the game along with the majority of the living players. However, 300 players, including Kazuto's sweetheart Yuuki Asuna, are still trapped by the NerveGear and have failed to awaken. Kazuto finds a picture of what looks like Asuna in one of the other VRMMO games known as ALfheim Online (ALO). And so he must now embark on another quest for the sake of his love, who is held captive in ALfheim Online. Cordial Chords (OS BD/DVD) - Distant Journey (Alicization BD/DVD Vol.1) - If We Could Walk Together (Alicization WoU BD/DVD Vol.8) - If You Were Here (Alicization BD/DVD Vol.8) - If You Wish It (Alicization WoU BD/DVD Vol.2) - Rainbow Bridge (Extra Edition BD/DVD) - Sugary Days (Season 2 BD/DVD Vol.5) - Sisters' Prayer (Season 2 BD/DVD Vol.9) - The Day After (Season 1 BD/DVD Vol.9) - The Day Before (Season 1 BD/DVD Vol.1) Released as a special to Japanese Sword Art Online: Alicization anime Blu-ray Disc volume 8 limited edition. A compilation with additions and fixes of Material Editions released in 2019. ( Gaiden X3 [32/33]). The light novel series spans several virtual reality worlds, beginning with the game, Sword Art Online ( SAO), which is set in a world known as Aincrad. Each world is built on a game engine called the World Seed, which was initially developed specifically for SAO by Akihiko Kayaba, but was later duplicated for Alfheim Online ( ALO), and later willed to Kirito, who had it leaked online with the successful intention of reviving the virtual reality industry. A third world known as Gun Gale Online ( GGO) appears in the third arc and is stylized as a first-person shooter game instead of a role-playing game, and is the main setting of Alternative Gun Gale Online. It was created using the World Seed by an American company. A fourth world appears in the fourth arc known as the Underworld (UW). The world itself was created using the World Seed as a base, but it is as realistic as the real world due to using many powerful government resources to keep it running.