The Villainess Wants To Live
Fellycemy mama told me when i was younglife of an orphanwhen mama told me when i was youngpoor orphan
So from that point on, their relationship started to grow and they fell in love with each other, yadda, yadda.
Meanwhile, Bella used that opportunity to gather supporters from the aristocratic faction which consisted of people who despised the current empress due to her lack of background and started a rebellion. She ended up successful at killing the Emperor and the empress, along with Princess Adellia, Bella's younger half-sister.
But of course, the fate of the novel was on the side of the heroine and not the villainess. Together, the good main leads took down the villainess.
Bella had committed an unforgivable and terrible sin, so the crown prince sentenced her to public execution.