The fairy tale is back on

[donagigi]

And now I'm off to meet
his parents at a ball.
Just look at all
the gowns he sent!
The fairy tale is back ON
as long as the evil
queen doesn't ruin it.


What the "on" means here?

[Rover_KE]

We can't isolate on; it's part of a phrasal verb.

The fairy tale is back on means The fairy tale has resumed.

Rover