Bible Black (バイブルブラック Baiburuburakku) is an eroge video game for Microsoft Windows. It was developed by ActiveSoft and published by Kitty Media on July 14, 2000. Milky Studio has since been adapted the game into several hentai original video animations. The first adaption, simply titled Bible Black, consisted of six episodes animating numerous scenes from the video game. The following year, a two-episode OVA titled Origins was released, which served as a prequel to the events of Bible Black. In April 2004 Milky Studio produced a sequel series titled New Testament, which follows the exploits of the original characters ten years after Bible Black takes place. The latest OVA adaption, Only, consists of gaiden stories explaining what happened to various characters during or following the plot of Bible Black.
Plot: The Bible Black series features frequent sex and horror scenes, and revolves around a high school rumored to have been the base of operations for a coven twelve years prior to the premier installment. Comprised of this school's students, the self-dubbed "Witchcraft Club" practiced black magic in a storage room deep within the basement of the institute. Both teachers and students practicing the dark occult religion involving incantation sex and human sacrifice is a common occurrence in Bible Black and its many adaptions.
(source: Wikipedia)