Washio Sumi wa Yuusha de Aru - Chapter 4: Battle.

Instead of struggling meaninglessly, he acknowledged his place.

He was the Son of Dragon!

However, he was titled as the ‘Sinned Prince’ when he killed his mother.

She was supposed to marry her childhood lover but stepped forward to marry the Sinned Prince, whom every woman from the noble families has rejected.

With one motto in her mind— ‘To end the Qiu Royal Family.’

~~~~~

Qiu Lóng Wei is the youngest prince of the Qiu Kingdom. He was prophesied as the Son of Dragon, but his acts made him the Sinned Prince.

Xu Li Hua, the daughter of a Low-rank official, was forced to leave her town when her family was massacred on one deadly night.

The gentle and petite woman, who hardly has seen the world, enters the most dangerous place where a small mistake can take her to the door of death and get entangled with Lóng Wei.

~~~~~

Li Hua fell on the mattress while Lóng Wei hovered over her.

.....

“Whose ring is this?” Lóng Wei asked, looking at the red jade ring on her finger.

His palm went on her nape, and he pulled her face up, forcing her to look at him.

Li Hua pulled her hand back, but Lóng Wei didn’t let it go. Instead, he took out the ring from her finger.

“You are my official wife now. In your life only one man shall exist, and that’s me!” Lóng Wei authorized, clenching his fist which was holding the jade ring.

“The Prince cannot force his decision on me. Even if he takes my body, he can never take my heart,” Li Hua said, with a stern tone.

Lóng Wei clicked his tongue and twisted his lips into a smirk.

“Watch your words, Li Hua. Not only your body will be mine but your heart and soul too. I go crazy for the things that are precious to me. You are my wife, so my craziness for you is beyond description.”

She was born into a powerful family of the nobility, a blue-blooded aristocrat as capable as any man. He rose from humble origins up the military ranks, an iron-blooded knight with high ambitions. A transaction for power severed her from her childhood sweetheart. A tardy encounter was the beginning of his and her vow to meet life and death under heaven, standing shoulder to shoulder.

Political intrigue, dynastic succession struggles. He trampled through it all in the toil of becoming emperor.

Old enmities became new disputes, concerning life and death of entire families. She entered once more into the palace, changing the entire political climate of their world.

Meeting once again, they had become strangers. The peach blossom were all fallen, no more than a golden age grown cold.

- Description from Novelupdates

After rebirth, she, who used to be a top international spy, becomes the eldest daughter of the Fengs, a fat girl who is ugly and foolish in the eyes of the ordinary people.
Mastering Royal 18 Saber Moves and Purgatory 9 Palms, she rose to fame with the martial arts of Demon Cook.
Upon an imperial edict, she was ennobled as the wife of Lord Cen, and then suffered various intrigues and plots…
She proved herself to be a real overmatch and a true genius to the world…