is a Japanese manga series written and illustrated by George Asakura. It was serialized in Shodensha's manga magazine Feel Young from July 2003 to December 2008, with its chapters collected in five 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 manga magazine Feel Young from July 8, 2003, to December 8, 2008. Shodensha collected its chapters in five volumes, released from May 8, 2004, to February 7, 2009.
A spin-off, titled , was serialized in Feel Young from March 7 to June 8, 2015. A single volume was released on July 8, 2015.
A live action film adaptation directed by Tomorowo Taguchi premiered on September 5, 2015.
The film grossed on its opening weekend and was number 10 at the box office.