beta
The spoilers that I've seen briefly didn't quite encapsulate what has happened. Don't read this if you are just getting started it is much better coming up to it on Ch 57.
So basically, Silence is the real world.
Silence sucked so much, that after both of their deaths, Huimin isekai'd to a world OF HIS OWN IMAGINATION AND MAKING! (tf kind of magician shit is this)
Iheon got pulled in along for the ride. Figured out what was happening because of the limits of Huimin's own imagination.
Concluded that they would likely both die at the end of Huimin's art creations.
So Iheon Cha planted the book Silence, which is essentially Huimin's (or maybe both) of their memories in Huimin's house. In the hopes that they can go back to their world and be together again.
But of course, based on Ch 1. Huimin only remembered his life in the made up world, Silence being a book. And Iheon didn't remember the Huimin's made up world until Huimin's first heat. Crazy how sex brings memories back. (see Liar manhwa)