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Warning Spoiler Alert: This article or section contains details about plotlines not covered in the anime. Do not proceed unless you wish to be spoiled.

Versus II (バーサス II, Bāsasu II?) is the second and final part of a crossover story between the Sword Art Online and The irregular at magic high school series. This part of the crossover was written by Kawahara Reki, the author of Sword Art Online, supervised by Satou Tsutomu, the author of The irregular at magic high school, and published in Dengeki Bunko Magazine volume 40. This story is a sequel to Dream Game -Crossover- and Versus.

PlotEdit

Part 1Edit

A week after the encounter with Silver Crow during a test with the Soul Translator (STL), and several days after encountering Shiba Tatsuya in ALfheim Online, Kirigaya Kazuto (Kirito) was having breakfast with Kirigaya Suguha, when she asked him to explain what a quantum computer was. Although Kazuto was hesitant, once Suguha apologised for her question by saying that there were things that Kazuto did not know either, Kazuto agreed to give her a rough explanation.

Kazuto first explained the difference between quanta and elementary particles by using rice grains and their energy value as an analogy. He then explained what a Neumann computer was and stated that such computers had difficulty in decomposing large numbers into prime numbers. Finally, he explained how a quantum computer would be superior to a Neumann computer, as it could process multiple tasks simultaneously via superposition. However, to Kazuto's dismay, after he finished his explanation, Suguha bluntly stated that she did not understand the explanation.

Part 2Edit

Later that day, Kazuto came to his part-time job in Roppongi and complained to Higa Takeru about Suguha not comprehending his explanation. After Kazuto calmed down, he asked Takeru whether the STL was capable of decomposing very large numbers into prime numbers. Takeru claimed that it could not, but admitted that he had tried tried improving the STL to win the prize for deciphering an RSA encryption until his actions were discovered by Kikuoka Seijirou and he was scolded for it. Takeru then changed the topic, as he wanted to begin the test. While waiting for the test to begin, Kazuto recalled how he had encountered Silver Crow during the previous test and thought how the event could have been caused by the STL using quantum registers in parallel worlds, resulting in the two quantum devices interfering with each other. Kazuto ended his thoughts with the conclusion that he could not verify this, as such an event was unlikely to occur again.

Part 3Edit

Kirito found himself inside a pure white sphere, instead of a forest where he should have appeared. Although Kirito had asked to use a default avatar, he found that he looked exactly like his avatar in ALfheim Online. Just as Kirito voiced his complaint about the situation, he heard another person responding to him. Kirito was about to draw his sword when he realised that he had already met with the person before. Although the man wore a school uniform that Kirito had no memories of, he recognised the man as being the mysterious character who had taken the role of the giant Beli in a quest in ALO.

After Tatsuya explained that they were inside a virtual simulation, he decided to tell Kirito his real name and then considered whether he should take the same measures to deal with his own world connecting with Kirito's. However, Kirito claimed that there should be other measures that would overload the simulator and break the connection. Kirito then recalled his conversation with Suguha in the morning and came up with the idea to have the simulator decompose a very large number into prime numbers. He began flying by using his fairy wings and, after Tatsuya followed him, Kirito shared his idea with Tatsuya. However, to Kirito's shock, Tatsuya handled the decomposition via mental arithmetics in a brief moment, causing the world to collapse.

NavigationEdit

Sword Art Online Publication Navigation Bar
Aincrad Arc Fairy Dance Arc Extra Edition Phantom Bullet Arc Calibur Mother's Rosario Alicization Arc
Progressive Arc
Light Novels Main Series 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
Progressive Series Progressive 01 - Progressive 02 - Progressive 03 - Progressive 04
Alternative Series GGO 01 - GGO 02 - GGO 03 - GGO 04 - GGO 05 - GGO 06
Clover's Regret
Material Edition 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
Character Edition Lisbeth Edition - Silica Edition - Pina Edition
BD/DVD Specials Cordial Chord - Rainbow Bridge - Sugary Days - Sisters' Prayer - The Day After - The Day Before
Magazine Publications Calibur SS - The Celeste Fairy - VRMMO Development Tragedy - Story Pencil Board
Crossover Dream Game -Crossover- - Versus - Versus II
Dengeki Fair Breaking the Damage Limit - 16.8.5 - Agil and Klein’s Exciting Meal - Defensive Power - SAOP 4.1
Other Specials chromatic colors - Hopeful Chant
Web Stories There is But One Ultimate Way
Manga Aincrad Volume 01 - Volume 02
Fairy Dance Volume 01 - Volume 02 - Volume 03
Phantom Bullet Volume 01 - Volume 02 - Volume 03
Mother's Rosario Volume 01 - Volume 02 - Volume 03
Calibur Tankoubon
Alicization Volume 01
Progressive Volume 01 - Volume 02 - Volume 03 - Volume 04 - Volume 05 - Volume 06
Girls Ops Volume 01 - Volume 02 - Volume 03 - Volume 04
Ordinal Scale Volume 01
4koma Manga Volume 01 - Volume 02 - Volume 03
SAOAGGO Manga Volume 01
Comic Anthology Volume 01 - Volume 02
4koma Anthology Volume 01 - Volume 02 - Volume 03
Hollow Realization Volume 01
Aincrad Night of Kirito Tankoubon
Anime Season I - Aincrad Arc 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
Season I - Fairy Dance Arc Episode 15 - Episode 16 - Episode 17 - Episode 18 - Episode 19 - Episode 20 - Episode 21 - Episode 22 - Episode 23 - Episode 24 - Episode 25
Season I - Special Episodes Sword Art Online Extra Edition
Season II - Phantom Bullet Arc 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 14.5
Season II - Calibur Arc Episode 15 - Episode 16 - Episode 17
Season II - Mother's Rosario Arc Episode 18 - Episode 19 - Episode 20 - Episode 21 - Episode 22 - Episode 23 - Episode 24
Movie Sword Art Online The Movie -Ordinal Scale-
Sword Art Offline Episode 01 - Episode 02 - Episode 03 - Episode 04 - Episode 05 - Episode 06 - Episode 07 - Episode 08 - Episode 09 - Extra Edition
Two Episode 01 - Two Episode 02 - Two Episode 03 - Two Episode 04 - Two Episode 05 - Two Episode 06 - Two Episode 07 - Two Episode 08 - Two Episode 09
Ordinal Scale
Drama CD Accel World + Sword Art Online Drama CD Ordeals of Kirito
Sword Art Online Art Book and Guide Book Main Page

Start a Discussion Discussions about Versus II

  • Versus II translated

    • The translation of the second crossover story between Sword Art Online and Mahouka Koukou no Rettousei has been publishe...

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