Responses
Yep. SPOILER
The End was the previous Worlds that ended.
World 1: Sayoung died. World Ended. Uijae turned back time (with his watch).
World 2: Uijae (World 1) died because he was getting weak from basically turning back time to save Sayoung. Sayoung then will experience the end of this world. (He will not die ans continue to look for ways to save the world)
World 3: Is the Current world the manwha is taking place.
The Prometheus is accelerating the End.
As for how to save the world, I haven't gotten to that part yet. (Chapter 230 in Novel).
Ummm question to those who have completed the novel do they ever find out what is the "end" and like how do they stop it also might as well since im asking like how is prometheus or whatever conmected to it?