It sounds familiar... Did the MC plagiarise the novel? Meaning, did he write the novel based on a popular novel he read in his past life?
I can’t remember if it was a manhua or novel… I only have some vague impressions of the scene where the mc decided to plagiarise. Pretty sure it’s Chinese? Maybe try Metropolitan System?
Return of the Legend Chapters 5 & 6 describe the scene of him plagiarizing a future novel and then meeting some publishers with his mom.