Perfect Timing

What happens when a few clicks of some locks in a school, two girls, maniacal laughter, and a bunch of pentagrams are combined? (And a bunch of random shit :3 -Mia)

...

This story.

(DISCLAIMER: We all know about the girls who tried to murder their best friend to show dedication to Slender, but we want to inform you that we would NEVER do that. Thanks!)