Shinkyoku no Grimoire The Animation.

There is a new fervor at the Royal Academy of Magic, caused by the librarian Patricia, who reads a demonic grimoire. The grimoire takes advantage of Patricia's power and plunges the students of the Academy into the abyss of debauchery and lust. Only Umico can save her friends. She must become a reader of the Grimoire and read Dante's Divine Comedy.