December 5th 2018.
Isao was sitting in his room trying a theory. He wants to be some sort of timeologist. He developed a theory of how time works. The theory was made around that every decision we have in life, there is also a counterpart, where the decision you didn't take is another you did.
A good example is choosing between two things. He tells Rebecca his theory and explains it.
"So, imagine both of your parents are captured by one of my comic villains, like Mr. Might."
"Ok."
"And you can save only one."
"Ok."
"Whoever you chose the other one is gonna die, but both they also live and they are also dead."
"How?"
"It's easy to explain. So there are multiple instances of you in time, like you from now you from two seconds ago and you two seconds away from now. Let's say you chose to save your dad, your mom dies, but there is another you in the same plane, taking a different decision that modify the timeline and makes it's own timeline, like it's own universe, and there is a third that decides that she will save not save one of her parents and let them both die. So in conclusion in this plane both parents are dead, but also alive."
"I don't understand anything…"
"Yeah it's a bit too complicated… But let's just say it works…"
Isao draws the same Idea on paper.
"So there are at least 3 versions of me"
"Yes."
"And I am one of them"
"Yes."
"And all of them do different things at the same time."
"Yes."
"So the time itself here doesn't change, but there can be someone in a different plane, but at the same frequency that chose to save one of them, and another who chose none."
"You got it"
"Damn this is hard…"
"Welcome to the timeology domain.