It was serialized in Kodansha's seinen manga magazine Morning Two [ja] from August 2006 to September 2011, and later on the D Morning website from March to December 2011; its chapters were collected in nine tankōbon volumes.

[b] The series went on an over two-year hiatus and resumed on the D Morning website on March 6, 2014;[5] it finished on December 25 of that same year.

[6] Kodansha collected its chapters in nine tankōbon volumes, released from June 22, 2007,[7] to July 23, 2015.

[8] The series ranked tenth on Takarajimasha's Kono Manga ga Sugoi!

[17] Fantasium was one of the Jury Recommended Works at the 14th Japan Media Arts Festival in 2010.