If You Don't Know the Novel, You Will Die

One day I was in a world that I did not know. [The introduction 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?!
Source: MU
Includes 14 extra chapters.