Written and illustrated by Kenichi Kondo, Dark Gathering has been serialized in Shueisha's shōnen manga magazine Jump Square since March 4, 2019.

[2] On December 4, 2024, it was announced that the manga would enter a four-month hiatus to conduct research and prepare for a new story arc, and is set to resume on April 4, 2025.

[8] At New York Comic Con 2022, Viz Media announced that they licensed the series for English publication.

[39] It is produced by OLM and directed by Hiroshi Ikehata, with scripts written by Shigeru Murakoshi, and music composed by Kohta Yamamoto, Shun Narita, and Yūsuke Seo.

[41][42] The opening theme song is "Kakuriyo" (幽世, "Afterlife"), performed by Luz, while the ending theme songs are "Haiiro" (灰色, "Gray") for the first cours, and "Intaglio" (インタリオ, Intario) for the second cours, both performed by Kana Hanazawa.