MTL - I See The Galaxy - Chapter 1 I see

Emperor Ian Veroshion, the first noble mage, was betrayed and executed. Cursed to never be reborn, he awakens a century later as the illegitimate son of a disgraced ducal line, destined to be a hostage in a barbaric land. Stripped of his magic and his throne, he must navigate a world vastly different from the one he ruled, facing political machinations and a resurgent monster threat. But the embers of his past life still burn, and Ian will not surrender his legacy. He will reclaim his name, his magic, and perhaps, even his empire.

Transmigrated to a wizarding world.'But... what about the promise of wizards pursuing truth?''Why is it just a bunch of greedy people who seek power!'...Passing guests, please come in and take a look; if it's not the right fit, then feel free to leave.

Su Ran, a music prodigy, woke up transmigrated into a book.

At that point in time, the main story arc in the book had already been completed. As a villainess female supporting character, not only did she need to take over the original owner’s pitiful life in poverty, she also gained an instant son right at his rebellious period.

Ten or so more years from then, the son would turn into a twisted, evil villain. He would appear in one of the extra chapters to pick on the male and female lead’s children.

***

Su Ran: Son, you shouldn’t be too outstanding.
Su Han: Why not?
Su Ran: ’cause you will be killed.

Su Ran: Son, would you like to learn music from me and become a zen, little fairy boy who only needs to drink dew.
Su Han: No, I want to go into business so I can support you.

- Description from Novelupdates

To be a good mistress:

Lesson 1: The location does not matter; all that matter is whether he wishes to.

“This is an exchange for money and not a game of love.”

Yet, he is eventually addicted to spoiling her and sending her to cloud nine, giving her whatever she wishes for.

—

“Young Master Huo, Ms. An said that she wants to be the world’s top supermodel.”

As a result, news of the Huo Conglomerate entering the entertainment industry shocks the entire world.

“Young Master Huo, Ms. An said that she wants to get married at the age of 28.” The man’s gaze deepened as he replied, “That’s too late.”

The little bun behind him secretly hands him a household registration book and declares with a nasal and innocent-sounding voice, “Daddy, I will pay for your nine-dollar marriage registration fee!”