In her first life, she was an orphan. After finally graduating from college, she became a corporate workhorse and died suddenly from working too much overtime.
In her second life, her soul entered the Great Yan Dynasty, where she became the War King’s only daughter, a noble princess.
Her loving relatives surrounded her, noble young ladies fawned over her, and young men from aristocratic families praised her. As she lay flat, she forgot how greedy and wicked people could be.
Her father was framed and badly wounded. He lost his military tally and died within a couple of years. Her mother, overcome with grief, soon followed him.
Her beloved imperial uncle was poisoned, and her aunt was forced to take her own life.
Her elder brother, the crown prince, lost the throne and died a horrible death. To protect her, the empress dowager had no choice but to acknowledge the usurper.
And he was even hacked several times with a blade for her sake.
As she lay dying, she regretted everything. If she hadn’t been so foolish and lazy, the people around her wouldn’t have suffered.
When she woke again, she discovered that she had been reborn, returning to the age of ten, just before her father was due to leave for the border.
This time, she would make sure nothing happened to those around her, and make everyone who had harmed them pay a hundredfold.
(The male and female leads are both unhinged and devious. The heroine shows a little of it early on, but is afraid of scaring the hero and does her best to hold back. Once they come clean to each other later on, they both let loose completely.)