Sword Art Online Light Novel Volume 21

Unital Ring I (ユナイタル・リングＩ) is the 21st book in the Sword Art Online light novel series, published on December 7, 2018. It is the first volume in the Unital Ring Arc.



Preview
Kirito, Asuna, and Alice take on the survival MMO named «Unital Ring»!

One month following Kirito and Asuna's return from «Underworld». Having obtained a physical body in the real world, Alice had joined their midst. However, their peace suddenly came to an end.

"…………Level 1…………"

"I also turned level 1!"

The three of them were suddenly dragged into a mysterious game named «Unital Ring». This was a «Survival MMO» formed by «The Seed» program by fusing all other VRMMO games. Having lost all of his precious equipment at the start of the game, Kirito was left with nothing more than a pair of underwear. Under these dire circumstances, Kirito takes on the «VRMMOSVG» shrouded in mysteries!

Prologue
In a log entry dated September 15, 2026, two anonymous speakers were holding a cryptic conversation.

Chapter 1
Despite Yuuki Asuna's birthday fast approaching, her boyfriend Kirigaya Kazuto (Kirito) still found himself at a loss as to what present he should offer her for the occasion. On September 27, 2026, the boy attempted to consult with his foster daughter Yui for ideas, only to be told that she would be happy with anything he chose for her by himself. Deciding to postpone his decision for a birthday present until he managed to do more research on the subject, Kazuto switched from his Augma earpiece to his AmuSphere device and logged into ALfheim Online.