Ryouki 2 ~Ayashiku Ugomeku Inbou no Enbukyoku~

The emperor and empress of the revered Phoenicia Empire fell ill. Shortly after, the empress passed away, and the emperor's condition teetered between life and death. Rumors spread that the emperor's symptoms might be due to a curse, leading to a witch hunt within and outside the palace. Concerned about the situation, princesses Leticia and Iria organized an imperial guard to quell the unrest. Amidst this, a low-ranking knight named Leon, believing he has royal blood, sought to exploit the chaos to eliminate rival royals. [Translated from DLsite]