“Have you ever heard of memento mori?”
“It means that you should always remember that you too will die someday.”

When I was in high school, I was in love with a mysterious girl.
She seemed cold but also thoughtful at the same time,
and she seemed to be smart yet somehow a bit goofy at times.
She had many secrets and she never told me what those secrets were.
When I told her, , she welcomed me and we made many happy memories.
Until a car accident took her away from me.

And 10 years later, I found myself being a teacher.
Maybe it was a cruel twist of fate, but on the first day that I have been assigned to my alma mater, I was heading towards the old school club room where I used to hang out after the day was over.
[……Not a thing has changed]
As I turned away with some tears running down my cheeks out of sentimentality,

“Are you heading back already?”

……Suddenly,
I heard a voice that I have missed for so long.
When I looked back, I saw her looking the same as she was 10 years ago,
but now, she was a ghost.