What happened ?

'Real Iheon' is the same person as the 'novel Iheon'. They kinda went through three different timeline but one of them is a different world that mc wish he had while he suffered in the 'novel world'(or something like that).

Iheon from the 'real world' follow after huimin into the novel but he forgot his memory from the 'real world'. He only recall that memory some time after that.
The 'real world' probably already destroyed after huimin left, since that world only function around huimin.

Thanks !