The series' title comes from the Italian word for 'Champion'.
Based on a light novel series written by Takezuki Jou and illustrated by Sikorsky. It has been published by Shueisha since May 2008, first under their Super Dash Bunko imprint (which was abolished in 2014) and then under their Dash X Bunko imprint since. The series concluded with the 21st volume on November 22, 2017.
The first episode was streamed on June 28, 2012 during a special event on Nico Nico Douga. The regular TV broadcast started on July 6, 2012.