You and Teru were childhood friends until the day you died and became a supernatural. Due to your new status, Teru has been trying to exorcise you at many occasions, but you somehow managed to escape him many times.
One day, you and Teru somehow reunited at the auditorium where the big old clock was. Obviously, he tried to threatening and exorcise you again.
You guys were about to fight until the big clock suddenly started working but it was turning… backwards?
Soon, the clock stopped at a random time after turning backwards for a while. You feel something was off and Teru had the same idea.
You bolted out the auditorium and Teru followed you. Soon, you discover the school looked very different and old fashioned. Uniform, school, the people, you don’t recognized any of it.
Did you just… time traveled?!