A second trailer for Sword Art Online -Progressive- Scherzo of Deep Night has been released. The 36-second video previews a few action cuts, including one of information broker Argo the Rat somersaulting in the air and preparing a powerful-looking punch.

Also shown in the trailer are lead Sword Art Online characters Kirito and Asuna, the player killer Morte, Agil, Mito (the anime-original character introduced in 2021’s Sword Art Online -Progressive- Aria of a Starless Night), and the floating head of the Floor Boss Fuscus the Vacant Colossus.

Aside from the trailer, a new key visual for Scherzo of Deep Night was released, with Kirito, Asuna, Mito, and Argo being prominently featured. Additionally, Eir Aoi was revealed to be the artist for the film’s theme song, “Shinzou.” 

Scherzo of Deep Night is set to premiere in Japan on September 10. Like Aria of a Starless Night, it is based on the Sword Art Online Progressive spin-off light novel series that expands on the “Aincrad arc” of the original and still ongoing Sword Art Online series. Scherzo of Deep Night is the title of the story in Sword Art Online Progressive‘s fourth volume.

Yen Press describes the volume as:

It’s been just two months since they were trapped in the game of death that is Sword Art Online, and Kirito and Asuna continue their struggle at the vanguard of progress through the game. The fifth floor of Aincrad is a mazelike ruin, and the two dare to take pleasure in raiding it for the treasure it contains. Upon returning to the fourth floor, it’s time to do some questing on behalf of the Elf Lord Yofilis–but here begins Asuna’s discontent, for in doing so they will have to face her least favorite monster ever…

The returning staff from Aria of a Starless Night includes Ayako Kounou as director, Kento Toya as character designer and chief animation director, Yasuyuki Kai as action director and monster designer, Aya Akizuki and Keisuke Watanabe as sub-character designers, Yusa Itou as art director, Naomi Nakano as color designer, Yuki Oushima as photography director, Kengo Oda as CG director, and Yuki Kajiura as music composer. A-1 Pictures is the animation production company. 

Tomimi Ishikawa and Hiroshi Nakajima are no longer listed as sub-character designer and co-CG director respectively.

Meanwhile, the cast includes Yoshitsugu Matsuoka as Kirito, Haruka Tomatsu as Asuna, Shiori Izawa as Argo, Inori Minase as Mito, and Yuusuke Kobayashi as Morte.

The first volume of the Sword Art Online Progressive light novels was published in 2012, a few years after the first Sword Art Online volume in 2009, while the eighth and latest volume was released in June 2021. The books are published under Kadokawa’s Dengeki Bunko label. Both the main and Progressive Sword Art Online light novels are written by Reki Kawahara with illustrations by abec.

The Sword Art Online Progressive light novels have been adapted into manga since 2014. Instead of being adapted as a single, lengthy series, the light novels are divided into separate manga series from different artists, with Sword Art Online Progressive by Himura Kiseki being the first. The others are Sword Art Online: Progressive – Barcarolle of Froth by Shiomi Miyoshi, Sword Art Online: Progressive – Scherzo of Deep Night by Puyocha, and Sword Art Online Progressive: Canon of the Golden Rule by Mugetsu. August 26 will see the release of Canon of the Golden Rule‘s second tankoubon volume.

Source: Sword Art Online -Progressive- Scherzo of Deep Night website (1), (2)