Interesting Adventure/fantasy

I transmigrated into a novel and became an aide to the final boss of the story. The final boss dies in the novel, but only after the world falls to ruin. What if the final boss doesn't go down the wrong path? I have no choice but to try to redeem the soon-to-be final boss before it's too late!

6th year drama assistant writer Jang Yeon-jae. He desperately wanted and tried, but ahead of his debut, his teacher the main writer Kim Tae-jin stole his script. "sir! How could you do this! That's my script!” “Yeon-jae. It is true that I was a little influenced by your ideas. But that is definitely my work.” After leaving the assistant writer job out of anger, he looked for a way to knock Kim Tae-jin down, but there seemed to be no hope. But at that moment... A miracle happened.