Lady of the Underground World

Summary

In her past life, she was nothing more than a complete puppet.
A life lived in silence under the shadows of her parents.
Its end was a tragic death from overwork — a truth she remembered only after slamming her head against a tree!

The Niberius family, once rulers of the underground world through weapons manufacturing and distribution.
Cecilia, their only daughter, is momentarily stunned by the memories of her previous life. But upon seeing her new self and surroundings, she makes a firm vow:

“In this life, I will live freely, without being oppressed by anyone!”

As Cecilia Niberius, the only daughter of the Niberius family, her life will not end in misery.

Living a carefree life while longing for freedom, Cecilia suddenly receives shocking news from her father.

“I have only six months left to live.”
“What?”
“So, Cecilia, this is your father’s final request. Please let me see you married before I die!”
“What?!”

But the misfortune didn’t end there.
Soon, Cecilia discovers that the Niberius family is on the brink of destruction.

She manages to gather a clue and learns that her family has been accused of stealing blueprints for firearms. She heads to the scene of the incident to investigate—
Only to be met with:

“You’re like a filthy little rat.”

A cold blade touches her back.
The man radiating killing intent is none other than Pierre Cardinand — the emperor’s confidant and the king among nobles.

It was the beginning of a relentless entanglement.