Recommendations Transmigrated for the Big Villain

Hello, I want to read a Chinese novel about transmigration or maybe rebirth. Preferably in modern days. Ancient China is also fine too!
So, the key is I want the FL is being coupled with a villain or the final boss ,(｡•̀ᴗ-)✧

Here are some for reference:

• After Transmigrating into a Short-lived White Moonlight, had a HE with the Villain
  
• Become the Apex of the Black Tyrant CEO
  
• Offering Salted Fish To Master
  
• I Became the Villain’s Pendant

 

My first thought was
Transmigrating To Become The Boss's Little Fairy
It's vv bittersweet, the ml improves from a bad person to a good guy so idk if you mind

 

Ooooh, I do read it! It's so cuteeeee and sweeeeet! (☆▽☆)Thanks, btw( ╹▽╹ )

 

Let the villain go? It's an apocalypse cn

Spending the villain's money to extend my life

Guide to raising the sick villain