I got possessed by a disastrously flawed novel!

With only the determination to return home, I saved the world from the Demon King and met my death…
This cursed disaster of a story even had a Part 2.
Fortunately, Part 2 is a childcare story! I thought I just had to raise the saintess from the original,
but since it shares the same world as Part 1, I keep running into the companions.

On top of that, I got possessed by Adrian, the worst villain in the world,
and all the companions from Part 1 have strangely turned dark.
Will I ever be able to return to the original world?