He is Lovestruck in the Revenge - Chapter 284 - 277 Sleep with me

Due to an unexpected turn of events, Xia Fei consumed a Super Gene Optimization Fluid that bore no brand, expiry date, instructions or stated its place of origin.
Our story begins here…

A genius talisman practitioner is reborn as a seven-year-old girl! However, her innocent appearance belies her vicious personality.

After Chu Zheng was inexplicably determined to have died, the only trouble she had was to spend money.

Since the binding of this system, her waist is not sour, her legs are not hurting, and the special ones are not breathing, and every day lives in the fear of having to spend money.

System: Miss Sister, don’t just open the invincible mode! (▼皿▼#)

System: We set a small goal, first spend a hundred million!

Chu Zheng: Say good and lose, how is this inexplicable man? Don’t stop me! I am going to conquer the world!

A male lord: (quickly renamed) my name is the world name.

#Sister, learn that you can really do whatever you want with enough money#

- Description from novelupdates

This story is about a rookie researcher, who was forcefully dragged away from his restful life, compelled into facing various killers and zombies, always having to risk his life at the brink of death, and finally becoming an advanced researcher that is acclaimed by all. And throughout his adventure, he met an alluring(?) killing machine, who he started to have fantasies on after they had an accidental kiss…

Xiao Yan: Did I fall for him? But he’s a man!

Maya: Who knows…. maybe it’s the other way round?

- Description from Novelupdates