Lewd Demon Lord and the Lost Holy Grail

Like the other kingdoms, she attempted to conquer them.
But their ambitions were crushed when the king, Calus Alstaria, struck back.
The chalice in the king's hand at that time was
The chalice he had brought back from the holy continent of Lavundinia.
If you prayed with the chalice in your hand, you could instantly gain great power.
But it was a very dangerous chalice that required the sacrifice of one's own life...
Queen Sadilas lost all her magic power in the battle with the king.
But because she had eternal life, only her body remained, and she was imprisoned in the battlefield by the priest Adolphe.
Two years passed, and the two princes grew up.
One became a magic warrior to defeat the remnants of the whore, and the other became the king.
The newly crowned queen, Sylvia, was a woman of beauty and brains.
But she was obsessed with power, and plotted to undermine the king and turn him into a puppet slave.
It would take time to corrupt the king on her own.
Thinking of this, the queen finally turned her attention to the remnants of the whore.
She promised the remaining whores that she would restore the queen.
She promised the remaining whores that she would restore the queen, and in exchange, she would make herself the ruler of the land.
She told them that the king knew the key to her resurrection...
The king is now under the poisonous sway of the queen and the whore.
On the other side, the prince, Emil, a magical warrior, begins to realize the ruse as he defeats the remnants...
The story progresses while defeating the lewd demon and the mongolian girl.
This is a reverse-rape RPG with only a bad ending.