I'm the Mysterious Leader of the Salvation Organization - Chapter 577:

Living things really are ignorant – the greed to obtain the key to knowledge and the fundamentals of energy overpowers them. Little do they know that knowledge is full of lies and energy is the root of destruction. Us, mages, have mastered travelling through space and time. We are invincible, we can turn worlds into dust and you, mere ants, will be wiped out with no trace.

-Mage Adam

An A.I.(Artificial Intelligence) gets reincarnated into a world where he becomes a mage.

She was once an heiress, but later her family went bankrupt, and her fiancé betrayed her. Besides, she had to bear the expensive medical expenses of her brother. Therefore, to regain everything, she decidedly married her ex's cousin in a deal. Initially, he was very aloof and didn't care about women at all, but he gradually fell in love with her, protecting her and supporting her...

I became a side-character who died in anguish because of her good-for-nothing husband.

If I can’t avoid getting married, why don’t I change who I marry instead?

“Excellent, marriage sounds good.”

“Wise choice. Then let’s have a wedding ceremony that isn’t too ceremonious. Following that, I’ll need you to go down to the Fief and behave like the lady of the house until I call for you. Naturally, there won’t be any time to spend in leisure whilst dousing yourself in luxuries.”

“I’m not marrying you, but your father instead.”

“……Pardon?”

“I’m not going to marry you. Do you have a problem with that?”

This novel is also known as Lady Charm

In her past life, Jun MuYan had a hard life and died miserably. Her unborn child was ripped from her to be refined as an elixir, and even her own flesh was used as someone else’s stepping stone.

In this arduous life, she has an outwardly cold, adorable Bao (treasure/baby) beside her.

“Xiao Bao, that woman who wants to form a contract with the sacred beast is Mommy’s enemy.”

Thus, the top sacred beast becomes Xiao Bao’s pet.

“Xiao Bao, this God Musician’s inheritance is too powerful!”

Tiny hands move, and the place of inheritance opens. Jun MuYan becomes the only successor of the God Musician.

“Xiao Bao, this man is always pestering Mommy and doesn’t let go!”

Xiao Bao immediately strikes to drive said man away… hey, you can’t be driven away!?

You’re my father? What father? Can you even eat that?

- Description from Novelupdates