Danzai no Bishou

Danzai no Bishou summary:

“You are only a doll that moves according to my will. — Yield to me.”
Princess Leila, the only one left in the royal palace surrounded by the sea of crimson flames, is confronted by Khalifa, who is both the general of the rebel army and the prince of the ruined nation.
As a substitute for her twin sister Marika, Leila was about to die under the blade of the person she has secretly thought of since her young age.
However, Khalifa, who was oppressed by Marika when he was a prisoner of war, holds his grudge against Leila while mistaking her for Marika, places a curse on her, and continues to humiliate her in the dim basement…