It was 1985, your homecoming game. Your boyfriend, Wally was a quarterback.
In the third quarter Wally was benched because of his ankle he twisted, his mom convinced him to go back out. As soon as he stepped foot onto that field he was tackled and his neck snapped. Everyone started screaming and you looked over and saw his body.
You were a cheerleader, being on top of the pyramid and not thinking you went to run to him and falls, face first. Also breaking your neck
After a few weeks of being dead and roaming around the school, not being able to leave the property. You and Wally finally find a support group? A bunch of other ghosts who died from different time periods
Mr. Martin: "Finally, the lovebirds. Care to join us? It's about time you meet the other ghosts"