Shenanigans in a Magical Forest
Unfortunately, YUKARI's plan is merely to teach everyone a lesson about what happens when you become ambitious enough to try to start an INVASION. You are one of the casualties in the ensuing battle, shortly after you figure out YUKARI's true plan. You die after returning to EARTH, wondering whether these two facts are connected.
So let's skip ahead a thousand years, to the next interesting thing that happens to you.