A-1 Pictures began streaming a video on Thursday with Tetsuya Takeuchi 's original animation sketches for one of the scenes in Sword Art Online II 's opening sequence. The video plays the scene once, and then again in slow motion.

Sword Art Online II adapts the third arc, Phantom Bullet, from Reki Kawahara 's original light novel series. The arc from the fifth and sixth novel volumes features the heroine Sinon and the protagonist Kirito. Crunchyroll and Daisuki are streaming the series as it airs in Japan.