Sword Art Online: Progressive Kuraki Yuuyami no Scherzo ( Scherzo of a Deep Night film Japanese theaters this fall (October-December)
Therefore, the film is based on the light novel Progressive by author Reki Kawahara . The novel released in 2012 as a revised version retelling events that happened in Sword Art Online.
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Directed by Ayako Kouno (Shigatsu wa Kimi no Uso) at A-1 Pictures , character design and animation direction by Kento Toya .
Synopsis:
The fifth floor of Aincrad is a dimly lit area of ruins and relics. During the beta test, this floor was the scene of many PKs, so Asuna asks Kirito for a PVP dueling lesson. Asuna considers Kirito to be a very wise and trustworthy person, but she relies heavily on him. For this reason, she will seek to gradually become independent of him on this floor.
Finally, the story describes Kirito's journey through the floating castle of Aincrad from the beginning, floor by floor.
Via: Comic Natalie