Sword Art Online Material Edition 01

The Progressers (攻略者たち) is the first Material Edition of «Sword Art Online». Kawahara Reki published it under his pen name Kunori Fumio.

Summary
Asuna and Kirito argue over the way on how to defeat the 56th Floor Boss. They end up duelling each other, with Kirito emerging as the winner. Asuna mulls over her defeat outside at midnight. She unknowingly triggers a flag that gives her a clue on how to defeat the floor boss.