I left my bedroom for less than a minute.
I remember this clearly because I was only going downstairs to grab my charger. My room was messy, but in a normal way: books on the desk, hoodie on the chair, notebook open beside my laptop.
When I came back, the notebook was closed.
That alone would not be strange, except my pen was placed perfectly across the cover, like someone had done it on purpose. I live alone in a small apartment, and my door was locked.
I tried to convince myself that maybe I had closed it without remembering. But I know I did not.
The strangest part is that the page I had been writing on was gone. Not ripped out. Just missing from the notebook completely.
I still have the notebook. One page is gone from the middle, and I have no idea how.