"Freezing Time"
In the original, Chronos's contracted human should have died from his fiancé's betrayal, but then, he stubbornly tried to save his contracted human.
Well, the fact that he could turn back time and even create a parallel world was also thanks to a certain fairy of space who also thought that killing the human favored by the fairies was a big calamity.
Not to mention that Chronos loved Finley so much that he asked Aetheria, the fairy of space, to agree to his big move.
Alas, the price he had to pay to create such a big move was to become an ordinary fairy after his contracted human passed away in the future.
The same goes for Aetheria.
Their power would be passed down to another fairy.
As for the existence of a parallel world...it wasn't actually the first time it happened, there were many parallel world versions before the one he unknowingly created.
But, well...let's think too much about these parallel worlds.