MTL - Conan’s World Stand-in - v3 Chapter 23 5 years

Living as a concubine’s daughter in her previous life, He Danggui got herself and her daughter tortured and killed by her family and Princess Zhou, while her husband, Lord Ning, allowed them to do so for a secret.

After reborn as a child, she swore to hold back her kindness to the villains. How did she survive in a family with various secrets and conspiracies? Who would be her final choice? The love of her previous life or a new lover who could offer her a happy and simple life?

Sharing the identities of doctor, political counsellor and princess, was she able to bring great changes both in Jianghu and the imperial family? With her intelligence and excellent medical skills, would she let them pay for what they did to her or live differently as a new one?

- Description from Novelupdates

This is a world where humans, demons and mysterious beasts coexist. Humans cultivate mysterious qi. Demons cultivate corporeal bodies. Mysterious beasts cultivate soul perception. A legend says that in the middle of an endless rainforest, there are extremely powerful existences; they are called demon kings. Some demon kings have a tyrannical corporeal body, some are experts in illusions. Some demon kings are proficient in magic, some can even move mountains. Some demon kings are able to sense things thousands of miles away. These demon kings rarely appear in the human world. Even if they emerge in the human world, they would reincarnate in human form; assimilating with mankind while seeking to breakthrough realms…….

I, Zatiel, Abyssal Lord, Ruler of Death and Destruction, Nightmare of Dys, have AWOKEN!!!!!.

His life contains events that can shake the universe:
-Fighting against Tiamat, Creator of Evil Dragonkind, in the first circle of hell, while billions of demons and devils butcher each other beneath them
-Start a World War against the Heavenly Race, and transform himself into a Golden Sun while he slaughters their greatest warriors, the Archangel.
-Enter the Final Gate and fight against the Outer Gods.
-Tearing the nine levels of Baator during his battles against the Prince of Evil, Asmodeus.

With his memories as a ruler of the Abyss and a Universal Existence, Zatiel will rise again.

In her previous life, An Xiulan had been oppressed and tortured by the members of Duke An's household. Her legitimate status wasn't enough to save her from the schemes of jealous siblings. For sixteen years, she tolerated the oppression inflicted on her but in the seventeenth year, she was pushed to death into the frozen lake.

Now she has reincarnated into the body of a youthful girl in the modern world who died in a car accident. She was given everything she was devoid of in her last life– family, love and education.

Graced with a new life, An Xiulan is determined to strive towards a better life. She will be the best daughter. She will study hard. And she will stay away from puppy love.

Nothing must come between her path to become a top scholar!

But there seems to be a hitch in the plan.

Why was the backbencher Han Zixin following her to the library, laboratory, playground and even the principal's office?

Wasn't Big Boss Han allergic to studies?

Why was he following the campus Belle?

…

Teacher: An Xiulan is a top student. We must preserve her at all costs.

Class Ten gulped as they recalled how a certain bro-con had supplied cheating slips to his model student sister in monthly tests subsequently resulting in her topping the exams!

Lu Xuan: No one is allowed to bully my sister!! Only I can bully her!

Everyone in class Ten: ????

A few days later, class Ten witnessed the delicate looking youthful girl chasing her self proclaimed brother with a hockey stick!

The delicate looking campus Belle wasn't delicate at all!

...

A delicate girl can't possibly make two big gangsters of Jingyuan Highschool dance on her tunes?