[Reborn heroine + Machiavellian + Upgraded heroine + Slow heat + Male protagonist]
Siru is dead.
In the name of a king and queen, he died for his country.
As an underappreciated concubine of the family, she married a husband with no financial resources, and she was very proud of being able to fight all the way to become the queen.
But she still died.
Before she died, she was deprived of her position as queen, and the country she had built so hard was overturned.
Waking up again, Siru returned to more than ten years ago, when everything had not yet begun.
Those who failed her, used her, and abused her are all still alive and well.
How can this be done?
Kill them all, kill them all!