After Kirito blocked the raiding guild's reinforcements, three mages of guild fired multiple magical projectiles at him. However, he used andlaquo;Deadly Sinsandraquo; to break all seven projectiles. As the reinforcements got into formation for battle, Kirito told Asuna that he would hold them off for three minutes with the help of Klein. In the meantime, the Sleeping Knights engaged the guild's forces blocking the path to the boss room. But, seeing that their assault was rendered useless by the intervention of the guild's healers, Asuna asked Siune to manage the healing herself and used andlaquo;Flashing Penetratorandraquo; to break through to the healers, while hugging the group's leader. After the healers were disposed of, the remained of the players were easily defeated, allowing Asuna and the others to enter the boss room. During the boss battle, Talken's spear was thrown into the air by the boss and it accidentally hit a crystal where the boss's two heads connected. Seeing that this caused the boss to assume a guard stance, Asuna deduced that it might be its weak point and tested it out by firing several ice pillars at the same spot. Confirming her deduction, Asuna left the healing to Siune to tell Yuuki to use a Sword Skill at the weak spot. Following Asuna's suggestion to use Tecchi as a stepping stone, Yuuki defeated the boss with her signature Original Sword Skill. After the battle, the group agreed to celebrate at Asuna's player home. While conversing about various things, Asuna asked whether she could join the Sleeping Knights, but, seeing that it resulted in an unpleasant reaction, she decided to change the topic and reminded everyone about the Monument of Swordsmen. At the monument, everyone took a picture and Yuuki accidentally called Asuna as her elder sister. Since she had also done the same in the boss room, Asuna pointed this out to Yuuki. Unexpectedly, Yuuki started crying and abruptly logged off.
In the near future, a Virtual Reality Massive Multiplayer Online Role-Playing Game (VRMMORPG) called Sword Art Online has been released where players control their avatars with their bodies using a piece of technology called Nerve Gear. One day, players discover they cannot log out, as the game creator is holding them captive unless they reach the 100th floor of the game's tower and defeat the final boss. However, if they die in the game, they die in real life. Their struggle for survival starts now...