I'm Scattering IQ to the Protagonist - Volume 1 _2_3_Chapter 24

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

Within the popular VRMMORPG «New Genesis», there was a ranker by the name of Arthur Holmes, commonly known by his in-game alias «Merlin».

On the day of her wedding to her childhood sweetheart, Natalie Ford received an unexpected gift: a marriage certificate. It stated that she was already married to a complete stranger—Aiden Handrix.While the wedding guests continued to mock and insult her, her lover Ivan decided to dump her, choosing to marry her half-sister Briena instead. To add insult to injury, she was thrown out of her home.To prove her innocence, Natalie Ford could only take one course of action - she had to find this mysterious Aiden Handrix and get to the bottom of this!The next day, there was news trending on the TV. Justin Harper, the heir of the richest family in the Bayford was returning home. Natalie’s eyes narrowed at the TV screen.‘Why does this man look exactly like the man in the picture of my wedding certificate?’In the quest of uncovering the mystery behind her said marriage, she decided to follow him and ask personally.“Are you married?”“No.”“Do you have a twin brother?”“No?”“By chance you heard the name Aiden Handrix?”“No.”“Then, who the hell are you?’“Your brother.”“Wait, what?”“Yes. Now pack your bags and come home with me.”First got a husband out of the blue and now a brother with the same face? Was god creating clones and offering them to her with different relationships?

Karl Adelheit, a self-proclaimed ordinary student returning from military service.

And a nobleman who enlisted as a soldier and received Medals of Honor.