It was you.

You were late for school.

I have a confession to make.

I've been using my farsight ability to spy on you these past few days.

I knew that you, and only you, still knew what it was that had been erased.

I thought if I kept watch on what you said and did, that could give me a clue.

And then...

I saw you arrive late on the morning of September 22nd.

That morning...

You weren't in a hurry. You'd been resting peacefully without a care in the world.

09/22 (Thur)

That's when I realized.

Before history changed, September 22nd must have been a holiday.

That's why you didn't realize you needed to go to work at first.

I borrowed a human calendar to make sure.

And it all started to fall into place.