Shinkyoku Sōkai Polyphonica(神曲奏界ポリフォニカ), also known as simply Polyphonica, is an all-age Japanese visual novel created by Ocelot and first released on the PC on April 28, 2006. Aside from the game, multiple series of light novels have been created, and a manga adaptation started in March 2007. An anime adaptation started airing in Japan on April 3, 2007. Another anime adaption aired from April to June 2009, and was a prequel of the events in the first anime.