9-nine- 新章
9-nine - Yukiiro Yukihana Yuki no Ato (Original Japanese Adult Version)
PALETTE is a Japanese adult ADV released on April 24, 2020, compatible with Windows 7, 8, 8.1, and 10 Japanese environments. The original artwork is by Tsubasu Izumi, the script by Fumi Kazuki, and the SD illustrations by Pero.
Kia Yuuki (9-nine-)
A second-year student at Kugata Girls' Academy, founder of the Valhalla Society.
Renya Takamine (9-nine-)
A third-year student at Hakusen Academy and leader of the Artifact user organization Rig Veda.
ゴースト（9-nine-）
A mysterious woman belonging to the Rigveda.
ソフィーティア（9-nine-）
A visitor from another world who comes to Sho and demands the return of the Artifact.
9-nine-.
A second-year student at Hakusen Academy, born into a multinational corporate family.
Yoichi Fukazawa (9-nine-)
A second-year student at Hakusen Academy and a friend of Sho.
Satsuki Naruse (9-nine-)
Sho's homeroom teacher and also serves as a shrine maiden at the White Snake Tsukumo Shrine.
Shinkai Sho (9-nine-)
A second-year student at Hakusen Academy, the protagonist of the Hakumi Tsugawa supernatural power incident.
A new chapter epilogue in Chunfeng
A branch continuing the female lead's relationship, depicting Sho going to the seaside.
A new chapter epilogue for Xia
Continuing the female lead's relationship, this episode depicts the cross-dressing activities when interacting with Sho.
9-nine - Kokonotsu Kokoka Kokono Iro (Original Japanese Adult Version)
PALETTE is a Japanese adult ADV released on April 28, 2017, compatible with Windows Vista, 7, 8, 8.1, and 10 Japanese environments. The original artwork is by Tsubasu Izumi, the script by Fumi Kazuki, and the SD illustrations by Pero.
9-nine - Sorairo Sora Uta Sora no Oto (Original Japanese Adult Version)
PALETTE is a Japanese adult ADV released on April 27, 2018, compatible with Windows Vista, 7, 8, 8.1, and 10 Japanese environments. The original artwork is by Tsubasu Izumi, the script by Fumi Kazuki, and the SD illustrations by Pero.
9-nine-Haruiro Haruko Haruko Harukaze (Original Japanese Adult Version)
PALETTE is a Japanese adult ADV released on April 26, 2019, compatible with Windows Vista, 7, 8, 8.1, and 10 Japanese environments. The original artwork is by Tsubasu Izumi, the script by Fumi Kazuki, and the SD illustrations by Pero.
9-nine- Ruler’s Crown
An anime adaptation of the 9-nine series, using ResoNAnce and Pale Blaze.
9-nine - All-ages PC collection
Released on April 23, 2021, this complete PC product includes the first four chapters and new chapters.
Eyes of the World (9-nine New Chapter)
Artifact-related abilities held by Sho. After becoming a dependent, they borrow it to synchronize with Nine; Ultimately, Sho hopes to obtain it intact at the start of the incident and close the passage.
Hakusen Academy (9-nine-)
The school attended by Sho, To, and Ten.
White Snake Tsukumo Shrine (9-nine-)
A shrine where Satsuki serves as the shrine maiden, safeguarding old treasures.
リグ・ヴェーダ（9-nine-）
An organization created by Artifact users for users.
Shiramizugawa City (9-nine-)
A town centered around a school, the main setting of the original 9-nine-.
セフィロト（9-nine-）
Organizations managing Artifact emerge in a world of different possibilities.
Artifact（9-nine-）
A device that carries magical power, also known as an artifact.
ヴァルハラ・ソサイエティ（9-nine-）
An organization founded by Shia herself.
Kosaka Harukaze (9-nine-)
A third-year student at Hakusen Academy and Sho's senior.
Xinhaitian (9-nine-)
A first-year student at Hakusen Academy and Sho's younger sister.
All the new chapters are BAD branches to rescue
Ichie, who was originally heading toward a bad ending, stopped Sho and Yoichi's conflict and agreed with Sho to restart their relationship from this branch.
A new chapter epilogue in the capital
Continuing the female lead's relationship, Ichie depicts attending a festival with Sho.
A new chapter of the day and the epilogue
Continuing the female lead's relationship, Ichie depicts taking care of Sho when he is ill.
9-nine- new chapter
PALETTE creates a new story for the 9-nine series, continuing the first four chapters; It is included in the all-ages PC collection and also available as a standalone downloadable version.