It was serialized in Mag Garden's Shōjo manga magazine Comic Blade Avarus from November 2007 to July 2011, with its chapters collected in seven tankōbon volumes as of October 2011.

Written and illustrated by Kawori Tsubaki, Number was serialized in Mag Garden's Shōjo manga magazine Comic Blade Avarus from November 15, 2007,[a] until its conclusion on July 15, 2011.

[b] The individual chapters were collected and published in seven tankōbon by Mag Garden, with the first volume released on May 10, 2008, and the final volume released on October 15, 2011.

[10] Planete BD reviewer Faustine Lillaz called the first volume "a mediocre introduction that serves mainly to set the scene" and gave the drawings 2 out of 4 "good" stars and she described the graphics as very dynamic and the decorations detailed and wrote: "The characters are expressive and charismatic, but they tend to pose, which is annoying.

"[17] Manga Sanctuary called tsubaki's Number completely disappointing with very smooth and basic graphics and layout that does not feel like a shōjo manga and does not know the purpose of the story at the end of the first volume.