Working!!, released in the US as Wagnaria!!, is a Japanese four-panel comic strip manga series written and illustrated by Karino Takatsu, which follows the activities of the unusual employees at one of the units of the Wagnaria family restaurant chain. The series was serialized in Square Enix's Young Gangan seinen manga magazine between January 2005 and November 2014. Square Enix released three drama CDs between 2007 and 2009 with scripts written by Shōgo Mukai. An anime television series was produced by A-1 Pictures and directed by Yoshimasa Hiraike, airing in three seasons in 2010, 2011, and 2015, respectively. In North America, the first two anime seasons are licensed by NIS America while the third is licensed by Aniplex of America.

Gangan is a manga imprint owned by Square Enix Holdings. It originated as a manga imprint for Enix before the company re-branded as Square Enix. It publishes manga in several anthologies aimed at different reader demographic groups in the Japanese market. Its anthologies are home to some popular Square Enix manga series which were adapted into anime series, like Fullmetal Alchemist, Moribito: Guardian of the Spirit, Nabari no Ou, Inu x Boku SS, The Case Study of Vanitas and Soul Eater. The comics are later collected in paperback volumes under brand names such as Gangan Comics , Gangan Comics Joker and Young Gangan Comics , which identify the anthology of serialisation. These paperback brand names are formed by omitting any gekkan or shōnen in the magazine name and inserting Comics directly after the word Gangan.