[Beautiful, strong and miserable heroine + a witch who cares for her sister + Machiavellian strategy + counterattack + fantasy elements (foreknowledge)]
My sister was newly married, but she was locked up in the firewood shed because of her stupidity; her home was ransacked, and she was abandoned by her parents. Fortunately, she was blessed by the heavens. She was saved by the prince, protected by her sister, and valued by the emperor. She went from being an abandoned daughter to becoming the emperor with ease. Who would have thought that she would be trapped behind the scenes and wanted to solve the world's problems, but she didn't expect that bad things would happen one after another~