The paper often contains a series of numbers or symbols that correspond to a locked locker or a keypad door. Check the Teacher's Lounge or Principal's Office for keypads that require these codes.
"Why... Why is this happening...?" "Just a moment ago, everything was normal..." "This isn't a dream... It's a nightmare...!"
You will often find color-coded keys or "Name Tags" of missing students. These are essential for unlocking specific hallways and the final basement area.