"Revealing The Secret As A Regressor" 

This world was born out of Finley's past world, so it could not be called a parallel world invasion or anything, unlike what Ainsley was about to do. 

What Ainsley wanted to do was indeed to turn back time first to create a parallel world, but then, she didn't exist yet in that new parallel world's timeline, which means she would be a parallel world's invader. 

Now, Finley wanted to reveal his secret to Ainsley exactly because of this 'similar situation' that Ainsley was about to experience. 

"The truth is, I....I am a time traveler, someone who came from the future, turned back time, and created this parallel world." 

"I...can be called a returnee, a regressor, or something like that." 

Finley finally dropped the bomb!

For a moment, time seemed to stand still, and all Ainsley could hear was the loud 'boom' noise in her head. 

She was in a trance for a while, and her eyes were out of focus, as if she was dead inside.