I Am a Rune Engraver, Carrying a Knife Makes Perfect Sense - Chapter 6 - Laugh, Weren’t You Born to Smile?

The main character Lei Yu does not have the ability to practice his family’s martial arts. He gets stepped on and tossed around. Due to certain reasons, he leaves the family, coincidentally gains an ability, and makes his own path to becoming an immortal.

- Description from Novelupdates

After causing a tech disaster in the real world, genius shut-in Rin Katsuro is sentenced by the gods and banished to Ereborn—a realm ruled by chaos, where ancient scripts control magic and dungeons feed on trauma.He wakes up in the body of a legendary war criminal—the Demon King's General—and is mistaken for the adoptive father of a demon princess.Armed with unstable “Error Magic” that lets him rewrite reality like code, Rin doesn’t want to be a hero... but when angels declare war on the demon races, and his daughter calls him “Papa,” he might just rewrite fate itself.This is the story of a broken man with nothing left to live for—until an entire world starts calling him Dad, Demon, and Destiny.

One day, Katsuragi Daichi and his classmates found themselves in a different world. The god who summoned them to another world divided its power and gave it to them, saying that it wanted Daichi and the rest to defeat the Demon King as heroes. However, Daichi alone was given no abilities. And sure enough, Daichi was thrown away and used as a decoy in a demon’s den. Eaten by a demon, Daichi had lost consciousness and thought he had passed away, though when he came to he noticed his statuses had skyrocketed. He had obtained『Revenge of the Resented』. Every time he died, his abnormal ability powered up.

Shen Ran transmigrates to a fantasy world and becomes a disciple of the Empyrean Sword Sect. Problem is, everything about him is ordinary— ordinary talent, ordinary temperament, ordinary life… In this cruel world where cultivation talent determines how far one could go, this means that Shen Ran’s future can be seen at a glance. Banished to the servant quarters as a servant disciple, his daily grind is to attend to mundane chores which will go on until he dies of old age a hundred years later.

Then he comes across a narrative modification system which makes it possible to rewrite entire lives! An avid reader of online novels in his previous life, Shen Ran relishes the chance to read the narratives of everyone and everything and alter them. The narratives modified by him will become reality!

This is the story of how he transforms his ordinary life by editing his narrative and going on to cultivate the Dao, handle calamities, and rule the ages. And he is limited only by his imagination!