Naruto: The Outsider's Resolve - Chapter 1.3 (003):

The novel is about an author who was reincarnated into his novel.This author thought that he would become a hero, like he always wished, but no, his fate was to become a Villain.His fate was to fight against humanity and against the supreme beings who were planning to invade the world.

Mo Zhu’s mother remarried after her father went missing, and she had lived in the countryside with her elderly grandmother ever since. The girl who had no parents wanted to protect herself. Therefore, to avoid getting bullied, she had turned wild since she was a child—she played truant, fought, and drank. There was nothing she did not know how to do. She was a problematic student in the eyes of her teachers, a big sister in the eyes of her classmates, and a hooligan in the eyes of her acquaintances.

Do not betray your employer;
Do not betray your companions;
do not lie;
Rather than violate it, I would rather be silent.
These are the four laws that “The Silent One” has abided by for thousands of years.

Day and night we roamed the streets of the Yordian cities,
Dressed in Chinese clothes, wearing a mask, with a long sword on his waist and a dagger in his pocket.
We take lives and receive payment.
We are as humble as ants and as noble as kings.
We hold the power over the life and death of others.
I never cared when I died.

Content tags: Fantasy and Magic Romance of the West Revenge

Search keywords: Protagonist: Giuliano, Enzo ┃ Supporting role: Antoine ┃ Others: fantasy, fictional, assassin

- Description from novelbuddy

She was one of the best assassins of the modern world; a sly, black belly, cutely stupid woman. She passed through into a mysterious world and into the body of a trash young girl that everyone brutally reviled. Idiot and ugly, they don’t know that she was a Seven Element Elementalist with a Dual Cultivation Body. Various Spirit Beasts and Devil Beasts would rush to make a contract with her. See how she plays the world at the ends of her fingertips and exact revenge on the people who made her life a living hell.

Just who is this bewitching villain?

Hey! I’m going to talk to you about something! I am not just a bewitching villain, I am your soon to be husband!

The woman roared: Who wants you to be my husband?

Bewitching Villain: Well, if you don’t want me to become your future husband, then why don’t you become my future wife instead?”

This world is nothing without you. How could you leave me alone? Even if you reincarnate a millennium later, I will still be here waiting for you.

He was a tyrannical emperor born between the heavens and earth thousands of years ago. He did not hesitate to defy the world, to turn the world upside down, to expend his Spiritual Force only for her to reincarnate.

He was the Demon Emperor born between the heavens and earth, Just so she can reincarnate, he fell into a deep, profound slumber, “Little Zi’er, as long as you live, even if it costs my life, I will do it for you. Just to know that you live, would make my wounded heart……whole.”

- Description from Novelupdates