MTL - My Spy Years - Chapter 1008v3 When did the feud take place?

He killed her father.He destroyed her life.And she rejected him as her fated mate.The King she swore to hate wants to protect her, but strings are attached.Now he wants her loyalty… and her heart.Claire Stenly swore she’d never kneel to the Lycan King who ruined her world.But every time Yeren looks at her, she feels the strings tighten. And every time she looks into his eyes, she forgets why she should run.He’s dangerous, untouchable, and sin wrapped in velvet.And somehow, she keeps finding herself in his arms instead of his dungeon.Claire tells herself she’s just surviving.Yeren tells himself she’s just a pawn.But the moment their lips meet, neither one believes their own lies anymore.Because… this puppet is starting to pull back.And when she cuts his strings, the whole damn kingdom will burn - no exaggeration there.A dark royal romance full of obsession, trauma, betrayal, and slow, sinful heat.Perfect for readers who want their fantasy dangerous, their lovers doomed,and their happy endings bloody.Do read responsibly.

The most unexpected weird destiny,
The most intense brain collision,
The cruelest battle of life and death,
The craziest bizarre fantasy,
The most bizarre truth …
It’s the first time, and another ten years!

- Description from Qidian

It took a long time for Yu Qingjia to learn that she was the original heroine in a Mary Sue Novel, and the other party held the female supporting system in their hands, and She was gearing up to grab her opportunity.

Hehe…

Anyway, sooner or later, she’s going to die, so it’s better to live a more comfortable life. Yu Qingjia completely let herself go, relying on her status as a legitimate daughter, she played her life against her father’s new beautiful concubine. This little concubine is not a good stubble either, as they come and go, the relationship between the two of them becomes bigger and bigger. Later, she gradually realized that something was wrong.

Why is her formidable enemy a ‘man’?

He is also a wanted man of the royal family, the youngest son of the deposed prince, and a famous tyrant in the future!

The royal family of this dynasty has a secret. For example, although these royal men are all beautiful and good at fighting, they are bloodthirsty, paranoid, and cruel from their genes.

Murong Yan fell from the clouds into the dust when he was young, and even had to disguise himself as a woman to avoid spies in the backyard of his followers. After great changes, the tyrannical element in his body could hardly be controlled until he met Yu Qingjia, his nominal “daughter”. In his restless and dark world, the sun suddenly radiated in.

- Description from Novelupdates

I’ve reincarnated as the reverse harem game’s villainess, the one and only step-daughter of the Eckart duke family.