Title: 神曲奏界ポリフォニカ THE BLACK
Romaji: Shinkyoku Soukai Polyphonica THE BLACK
Company: Ocelot (http://ocelot.product.co.jp/)
Release: 2007/08/10, the 1&2 box edition is 2009/12/18.
http://www.getchu.com/soft.phtml?id=406725
It's actually not an eroge but falls in a close category I guess. Every...