
Okay but..... How did the second timeline ended.. I know the third timeline kloff remember everything but not aeroc. But in the second timeline they got happy ending and got three kids and die and old age? And next they open their eyes they are both in the third timeline in which only kloff remember everything but aeroc doesn't.

I wouldn’t consider the third life as a third life as technically no one is living their third life. This life is about the top from the first life getting his second chance with a bottom that doesn’t remember anything. It might be best to think that the "third life" and the second life are taking place simultaneously in alternate universes.
Also the "third life" is marked as a side story, so you can consider the ending of the second life as the main ending.
Helloo if its okay for ya'll can I have a spoiler for the 3rd life? Why and how did 3rd life happen? Did aeroc still die in the 2nd life?