Angel Of Darkness (Injuu Kyoushi) (Series)

Atsuko and Sayaka think they have it made when they are both accepted into the same prestigious women`s academy. There, they will be free to explore the intense passion of their relationship, unbounded. But when the mystical bonds imprisoning a hideous ancient evil that feeds on the lust of nubile women are accidentally broken, the two young lovers soon learn they have more to fear than final exams.