Shinkyoku Sōkai Polyphonica: 3&4 Hanashi Kanketsuhen

Shinkyoku Sōkai Polyphonica (神曲奏界ポリフォニカ), also known as simply Polyphonica, is a Japanese all-age visual novel created by Ocelot and first released for Windows 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 that aired in Japan between April and June 2007. Another anime adaption aired from April to June 2009, and was a prequel of the events in the first anime. The original game, the Crimson series, will start its second installment, covering the third and fourth story.