His Contractual Mistress - Chapter 473 Kill Someone

Jiang Bai woke up one day and found with shock that he had transmigrated to a parallel world that is similar to Earth. There, he was granted a cheat system to help him forge the path of a tyrant in this new world. He was now stuck in this parallel world body, the body of a weak and cowardly person. Join Jiang Bai as he rose to the top in this new world!

- Description from Novelupdates

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.

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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

Kurogami Ichiro was desperate because he couldn’t achieve what he wanted when he once started his martial arts path at age of 8!

Damien was reincarnated as the villain in a shelved novel. He find himself on a wedding scene where the protagonist was destined to rob the marriage.He smirked while looking at the proud protagonist and arrogant heroine.Aren't you proud and arrogant? Let you know the consequences of offending the Villain!Destroy the background behind you and capture your family!Don't you love her? Aren't you the son of fortune? Kneel Down!!Now the choice is yours! Do you choose your family or the heroine?“Hehehe didn't the heavenly dao want to suppress and kill me? Let's see how I will play with your chosen 'son and daughters' to death! When the auspicious time will come, I will kill you too!!!”