Sword Art Online Wiki
Advertisement
Warning.png 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 a magazine bonus side story and the second and final part of a two-part crossover between the Sword Art Online and The irregular at magic high school (Mahouka Koukou no Rettousei) series. The second part of the crossover is written by Kawahara Reki, the author of Sword Art Online, and supervised by Satou Tsutomu, the author of The irregular at magic high school. It was released on October 10, 2014 as part of Dengeki Bunko MAGAZINE Vol.40.[1][2] Versus II serves as an epilogue to Dream Game -Crossover-, the first part of the crossover between Sword Art Online and The irregular at magic high school. It is also a spiritual sequel to Versus, the crossover story between Sword Art Online and Accel World.

This story is set several days after the events of the first part of the crossover and features Kirigaya Kazuto (Kirito), the protagonist of the Sword Art Online series, crossing over to The irregular at magic high school universe while testing the Soul Translator (STL) for Rath, which results in a brief reunion with Shiba Tatsuya, the protagonist of The irregular at magic high school series.

Plot[]

Part 1[]

A week after the encounter with Silver Crow during a test with the Soul Translator, and several days after encountering Shiba Tatsuya in ALfheim Online, Kirigaya Kazuto 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 2[]

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 3[]

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.

References[]

Navigation[]

Sword Art Online Publication Navigation Bar
Aincrad Arc Fairy Dance Arc Extra Edition Phantom Bullet Arc Calibur Mother's Rosario Ordinal Scale Alicization Arc Unital Ring 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 - Volume 21 - Volume 22 - Volume 23 - Volume 24 - Volume 25 - Volume 26
Progressive Series Progressive 01 - Progressive 02 - Progressive 03 - Progressive 04 - Progressive 05 - Progressive 06 - Progressive 07 - Progressive 08
Alternative Series GGO 01 - GGO 02 - GGO 03 - GGO 04 - GGO 05 - GGO 06 - GGO 07 - GGO 08 - GGO 09 - GGO 10
Clover's Regret Volume 1 - Clover's Regret Volume 2 - Clover's Regret Volume 3
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 - Volume 25 - Volume 26 - Volume 27 - Volume 28 - Volume 29
Character Edition Lisbeth Edition - Silica Edition - Pina Edition
BD/DVD Specials Main Series 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)
Alternative Series How LLENN Stopped Fretting and had Her Fire for Combat Sparked by Pitohui (AGGO BD/DVD Vol.6)
Magazine Publications Calibur SS - Celeste Fairy - Objectors! ~VRMMO Development Tragedy~ - Open-Air Bath - Salvia and the MTB
Crossover Dream Game -Crossover- - Versus - Versus II
Dengeki Fair Main Series 16.8.5 (2014) - 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)
Alternative Series LLENN and Fukaziroh Talking About Dates (2016) - Mizugi de Tatakaeru ka Online (MTO) (2018)
Other Specials Main Series chromatic colors (abec Art Works) - Cooking with the Wife (SAO x NewDays collaboration) - Hopeful Chant (Ordinal Scale screenings) - prismatic colors (abec Art Works Wanderers)
Alternative Series (AGGO) Girl Meets Gun ~P90 ni tsuite Yoku wakaru Online (PYO)~ (P-90 Airsoft Gun bonus) - Her step, step (ReoNa's Prologue Album) - Minami no Island Online (MIO) (Dengeki Island!) - MZO (Dengeki Splash) - Pitohui, Elsa, and a Fine Day for Handguns (AM.45 Airsoft Gun) - Sugoimizugi Jam (Dengeki Girls Swim Wear Festival) - The Untold Tale of the Vorpal Bunny's Birth ~Otherwise Known as the Worries of Two Gun Nuts~ (Vorpal Bunny Airsoft Gun bonus)
Alternative Series (Clover's Regret) Idle Talk - The Shinobi's Reckless Remarks (Dengeki Bunko Magazine Animate bonus) - The Story of the Matchmaking Bakeneko (Clover's Regret Vol.1 Animate bonus) - The Strange Tale of Makuwa Melons (Clover's Regret Vol.1 Melonbooks bonus)
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 - Volume 02 - Volume 03 - Volume 04 - Volume 05
Progressive Volume 01 - Volume 02 - Volume 03 - Volume 04 - Volume 05 - Volume 06 - Volume 07
Progressive - Barcarolle of Froth Volume 01 - Volume 02
Progressive - Scherzo of Deep Night Volume 01 - Volume 02
Girls Ops Volume 01 - Volume 02 - Volume 03 - Volume 04 - Volume 05 - Volume 06 - Volume 07 - Volume 08
Ordinal Scale Volume 01 - Volume 02 - Volume 03 - Volume 04 - Volume 05
Kiss and Fly Volume 01
4koma Manga Volume 01 - Volume 02 - Volume 03
SAOAGGO Manga Volume 01 - Volume 02 - Volume 03
Comic Anthology Volume 01 - Volume 02
4koma Anthology Volume 01 - Volume 02 - Volume 03
Hollow Realization Volume 01 - Volume 02 - Volume 03 - Volume 04 - Volume 05
Alicization Lycoris Volume 01 - Volume 02 - Volume 03
Aincrad Night of Kirito Tankoubon
Kirito's Gun Gale Wars 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-
AGGO Episode 01 - Episode 02 - Episode 03 - Episode 04 - Episode 05 - Episode 06 - Episode 07 - Episode 08 - Episode 09 - Episode 10 - Episode 11 - Episode 12
Season III - Alicization 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 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 47
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
Ichiban Kuji STAGE2
Ichiban Kuji STAGE3 Melodies Go Beyond the Forgetting Curve... - The Grand Plan for a Summer Festival Performance! - The Grand Plan to Overcoming Picky-Eating! - When Asuna and Yuuki Changed into Swimsuits
Ichiban Kuji Ordinal Scale A Brief Instant of Reminiscing Right Below the Concert - From Asuna's Diary on a Certain Day in Late April
SAO x KYOTO NIPPON FESTIVAL The Great Barrier of the Old Capital of Kyoto
Lycoris Drama CD Another Heroine Inverter
Sword Art Online Art Book and Guide Book Main Page
Advertisement