MTL - Plane Source Code - Chapter 74 Force 4 General

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

The Wilds relentlessly reclaim all things. Humanity shelters within their ever-dying cities. Mages create the only path forward.Tala had to fight tooth and nail in the Magic Academy to forge a path to power that was her own. She knows it’s her duty to use that power to serve humanity, defending them against the creatures of the untamable wilds. However, she skipped a few steps in her education, like apprenticing to someone who actually knows what they’re doing.Now, Tala has to balance learning as fast as she can with paying off the veritable mountain of debt the Magic Academy dropped on her shoulders for the opportunity; not to mention staying alive.Even though she should only be a Mageling, the world considers her a Mage. Bless the stars she directed most of her magic toward survival.

In a certain world, there was someone who excelled in magic combat, people called him 『Sage』. Seeking the strongest combat art, he devoted himself to research every magic and combat arts in existence. And the conclusion he arrived at was very cruel, 『My body is not fit for magic combat』. Yet he didn’t give up. He sealed his own soul with a magic art, and was reborn in a far-off future. And the magic theory in the completely changed world he saw there was of unbelievably low level.

Champion dream of an e-sports boy!
Champion dream of an e-sports boy!
Champion dream of an e-sports boy!

- Description from Uukanshu