
The book huimin had his own premonitions, or maybe his subconscious projected what he wants most, and he drew them.. and coz of the grief of book iheon dying and him killing himself... His soul got transferred into his premonitions along with Iheon, since they died consecutively.... Something like preparing them to handle the story or their life again by giving them new perspective....
It's like they're immersing in a very realistic virtual 3d world...
And when the time was right, they got back to their original timeline and world...

was also there... That's why he hid those sketches... Coz he knows about it too...
But, why doesn't he know Huimin's behavior in the real world if he knows? He should've had an inkling when his attitude changed from the one in the book...
He should've suspected that Huimin he knows who claims to have amnesia is from the real world ..
DO A DOGEZA HAND STAND WHILE SPINNING...
Yoo fellow chick class hunter reader ε=ε=(ノ≧∇≦)ノ
While barking