Divine Magus: Awakening - Chapter 31: Casting

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...

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

After announcing it will be discontinuing all service, the internet game ‘Yggdrasil’ shut down… That was the plan, but for some reason, the player character did not log out some time after the server was closed. NPCs start to become sentient. A normal youth who loves gaming in the real world seemed to have been transported into an alternate world along with his guild, becoming the strongest mage with the appearance of a skeleton, Momonga. He leads his guild ‘Ainz Ooal Gown’ towards an unprecedented legendary fantasy adventure!

Hanjun, who used to live alone, wakes up in a strange, old church in a different world called Eorera. In this world, there are two gods: the God of Light and the God of Darkness. A thousand years ago, the God of Darkness created demons and attacked humans. The God of Light was nowhere to be found, and people believed they were abandoned.Hanjun finds himself mistaken for being the God of Light by an old priest who was praying for help against the demons. Even though Hanjun is not actually a god, he ends up in a divine body on a stone throne, realizing he has lost most of his powers. He decides to help the humans by recruiting players from Earth through a game he creates called “God's Games Online.”He sends out gaming equipment for free to a few selected players, who will enter the game to help protect Ulon Town from the approaching demons. Hanjun also creates a game system and an NPC guide, using the old priest named Barry to lead the players.Hanjun hides his true identity As “Holy Son” and starts preparing to gather faith and regain his power to protect the people of Eorera.