If You Don't Know the Novel, You Will Die (Pre-serialization)

One day I was in a world that I did not know:
[The entrance to the quest has been successfully completed!]
[Quest (Main) - «Fix the world!». Content: This world was created by mixing four novels - Child Care, Contract Marriage, XXX, XXX. Genres are unknown. You must return the four distorted novels to the original.]
But... I have no memory of their content. If I make a mistake... then I’m going to die?! Besides, the distorted web novel characters are interested in me! What should I do?!