Ingoku Oujo ~Senjou ni Ochiru Futari no Ikusame~

In a faraway land, long forgotten in time, the human kingdom of Thracia and the Orcish empire went to war. Thracia's own queen went to the frontlines to lead an assault on the Orcs' fortress. However, neither she or her people were aware, that their true enemy was amongst them. On the night before the attack, Queen Yuuno and the General Minerva were imprisoned and brainwashed with a nefarious lust. Their story awaits you, mired in conspiracy and desire. [Translated from official site]