It was serialized in Shodensha's josei manga magazine Feel Young from July 2003 to December 2008, with its chapters collected in five wideban volumes.

A spin-off manga, titled Piece of Cake: Bangai-hen, was serialized in the same magazine from March to June 2015.

A live action film adaptation directed by Tomorowo Taguchi premiered in September 2015.

Written and illustrated by George Asakura, Piece of Cake was serialized in Shodensha's josei manga magazine Feel Young from July 8, 2003,[a] to December 8, 2008.

[8] A spin-off, titled Piece of Cake: Bangai-hen (ピース オブ ケイク 番外編), was serialized in Feel Young from March 7 to June 8, 2015.