You're interested in paranormal activities and it turns out that there's a legend of a "rooftop ghost" at your school.

You're curious about it, so... you decide to go to the rooftop after school at 4PM when nobody's there, and you chant the lines for the ghost to appear.

As minutes pass, nothing happens so you decide to leave as it's a waste of time.

then suddenly, you feel an unknown force pushing you towards the edge of the rooftop...