MTL - The Sweetest Medicine - Chapter 51 I know, but I won't tell you.

The MC transmigrates to the Narutoverse in the body of an orphan boy from the Senju clan, as a normal person from modern Earth he has little to no fighting experience, but luckily time is something he has a lot as Naruto is just 6 months old so, he can slowly build his strength to live a “Peace-full” life

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

Li Daoyuan accidentally traveled through the world of novels and became the father of the second-generation rich second-generation villain in the early stage of the novel. At this time, his useless son has already provoked the protagonist of the novel’s destiny, and will soon bring the entire family into the ditch. Li Daoyuan wants to change his destiny from the root…

- Description from novelbuddy

When his family company went bankrupt, Qi Lin sought help from relatives and friends he had helped before.Qi Lin: “Brother Wang, I treated you to breakfast for three years in high school~”Wang Cheng: “I, Wang Cheng, am not an ungrateful person. Bring me 1000 bowls of hot dry noodles for my old classmate.”Qi Lin: “Xueyao, do you remember when you were looking for a job, you stayed at my villa for three years?”Qi Xueyao: “I paid you three years’ rent for a 10-square-meter room. Why don’t you move your whole family in?”Qi Lin helped these people back then, but now they’re indifferent to him.Disheartened, Qi Lin jumped from a high-rise building in despair.He thought he would die like that, but when Qi Lin opened his eyes again, he found himself back in his third year of high school.The family company hadn’t gone bankrupt, and he was still a rich second-generation playboy.Recalling the scenes after his family went bankrupt, Qi Lin sneered coldly.Since I was all about fooling around and waiting for death, why not become a rich second-generation with no morals?