Hime Dorei: Mesu e to Ochiyuku Futago no Oujo(2008)

Hime Dorei: Mesu e to Ochiyuku Futago no Oujo is an adult anime OVA that follows Princess Tita, heir to the Ruvens Kingdom throne. When her sister Liese fears losing power, she hires Waldo, a practitioner of black magic, to prevent Tita's ascension. Waldo accepts the job on one condition: he chooses the method. Based on a game by Bishop, this dark fantasy tale explores themes of ambition, betrayal, and forbidden magic as Tita faces a sinister plot orchestrated by those closest to her.