Concerto of Black and White (黒白のコンチェルト, Kokubyaku no Koncheruto?) is the ninth Material Edition of the Sword Art Online series. Kawahara Reki published it under his pen name Kunori Fumio. It was sold at COMITIA 99 on February 5, 2012. The story features an adventure of Kirito and Asuna on the 3nd Floor of Aincrad. It was later expanded and published as the second volume of the Progressive series.