Apocalypse Of All Races - Chapter 3255 - 670: Su Yu’s plan (subscription required)5

This novel is also known as Female Star Student Is Awesome

Her best friend turned into her younger sister, destroyed her appearance, broke her legs, snatched her powerful fiancé, and designed to kill her mother. Unsatisfied, she locked her up in a mental asylum to be tortured until death!

Yun Hua returned to 13 years of age with hatred. This time, the debt of blood would be paid in blood.

Oppress the poisonous sister, beat up the scumbag fiancé, become the top student, become a scholarly expert, become a manhua artist. In the end, she became the chief anchorwoman on the largest global broadcast…

With one careless mistake, she accidentally took the gold medal during the Olympic swimming competition. The entire country cheered for the champion without knowing that she had no such intentions…

But all along the way, that unapproachable man protected her from nearby.

He spoke: For you, I would block deities. For you, I would fight gods. For you, I would kill Buddha!

He spoke again: If you don’t leave me, I won’t give you up either. I would rather turn my back on the world than slight my darling.

- Description from Novelupdates

The first time they met, she said to him, “Mr. Song, I see that you’re I’ll-fates, and I’m afraid that you will die soon. The people around him accused her of being a fraud, and threatened to beat her...

I finally managed to kill the demon lord.