The December issue of Shogakukan 's Sunday GX magazine revealed on Saturday that manga creator Rei Hiroe is planning a "big new dimension project." The magazine's next issue, which Shogakukan will ship on December 19, will contain more information on the project, as well as a preview of the project's visual, and a poster with art by Hiroe.

Hiroe is best known for his Black Lagoon action manga, which tells the story of a four-man team of mercenaries who operate in Southeast Asia, smuggling goods with their World War II PT boat and performing odd jobs that often involve and end up in shootouts. Hiroe launched the manga in Shogakukan 's Sunday GX magazine in 2002. Shogakukan published the manga's 10th volume in May 2014. Viz Media publishes the manga in North America, and it released the 10th volume in April 2015. The manga has been on hiatus since early 2014.