A New Snake In The Shinobi World - Chapter 368:

(Immortal Cultivation+Meeting a Perfect Match+Shura Field+Invincible Flow+Upgrade Flow+Playing the Pig and Eating the Tiger)—What is cultivation? When I think back to the past, cultivation was, as a baby, kicking my legs over and over again—kicking on the bed, kicking on the ground, kicking every single day. Cultivation was, as I grew older, swinging my sword again and again—slashing here, cutting there. Cultivation became, as I matured, the repeated harmony of yin and yang—busy tonight, and busy again tomorrow night. … My name is Xu Ming. I have never cared about the stipends given to me by those sect masters, noble ladies, or princesses.I said to her, “Can you give me a room closer to yours? I need to report my work to you at any moment.” Even if I accomplish nothing every day, I just want to watch how she cultivates. I…

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 villainous young master Dark Demon finally recalled the memories of his previous life at the sorting ceremony of the Dueling Academy. He was reborn in a very strange Galgame world.

And he was the ultimate villain in the game, the Demon God of Seven Original Sins!

Superbia、Invidia、Ira、Accidia、Avaritia、Gula、Luxuria！

Once any one of these seven indicators broke through the critical value, he would irreversibly transform into the Demon God!

In the era of Saint Marian, where the demons had been completely destroyed and the demon king had fallen into eternal sleep, no heresy was allowed to survive!