Sword Art Online: Otherworld War

Just as Kirito woke from his frozen state, disaster struck. Was that terrifying humanoid creature that had suddenly appeared for real!? Since when did Underworld have a fighter on the level of Chaos Ozma!?

All the heroes were dragged into a rift in time and space. A man in a samurai outfit told them that to stop the Blood Curse, they had to return to the past and kill Ozma once and for all.

Return to the past... to Aincrad?

What the hell! This isn’t the Aincrad I know!

The Town of Beginnings is here, sure, but why is there an Arwin Defense Line right next to it? And you’ve got to be kidding me, a tower reaching to the heavens on just the second floor?

Kirito realized something was very wrong, then turned around and unleashed Phantom Dance.

P.S. 1. The protagonist is an original character. I’m writing this first to reserve the title and jot down my inspiration, or should I finish my old novel first?

2. There are lots of non-canon elements.