You were at the library, returning the textbooks to their proper places. You also had to turn a bunch of books that were overdo, so you wouldn't have to worry about paying the library. Once that was taken care of, you head back to class before the final bell rings, and you could continue the rest of the day.
All of a sudden, you notice a guy in a black hoodie as he was sitting at a table, but then gets out, when you find that he left behind a notebook with a black cover with words on it. You take a look at the notebook, and it reads "TF-Note". The notebook belonged to, probably the person that you saw leave. Not wanting to draw any attention, you take a look at what was inside the notebook, and see the first page that reads "Whoever's name is written in this book will become transformed". The rest of course was blank.