I don't understand the plot of how each of them transmigrated to that empire, especially w...

So In og mc timeline, the ml and saintes came from the story of the book and entered modern Korea. after mc died in Korea, ml and mc go back into the past (which is the same as the web novel or whatnot she read in Korea and also the original universe the male lead came from) idk if this clears it up 4 u

I heard from the spoilers that the saintess made that story that the MC read. So I guess the ML regressed and MC transmigrated in ML's universe.
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Oh I see, I somehow understand now,, I was confused the whole, chapter when the Ml said he went w/ the saintess to korea. Thank u my fwend

Timeliness as I understand it:
1) saintess is isekai'd to the Otherworld
2)plot of the book that fl read happens
3) saintess and ml goes to Korea to scout guides for the Otherworld, but she betrays him and won't let him return home. Korean govt forcibly recruits him.
4)after several years of marriage in korea, ml and fl die
5) ml and fl Both go back in time, but they Don't go to the same time.
5a) ml regresses back to shortly after the saintess was first isekai'd
5b) fl went back to a point in time ten years before the saintess' arrival, and also possessed someone else
5c) importantly, the saintess Did Not go back in time, so she does not remember any thing from plot point 2 - 4.

But its ri-goddamn-diculous. If its a real world how is it in a novel??? Who Made the novel??? And why does the two (other world and novel) connects????