You were in class, learning about guardian demons and how, once you turn 18, your own guardian demon will appear.

You were anxious, as this meant you’d have to be more careful. This thing, this creature, was called a Guardian Demon, but it was no Guardian. Its purpose was to kill you.

You heard a sound behind you, and you knew that it was now here.

The demon saw you and grinned.

"Alrighty! My name is Akuma Asahi! I’ll have fun making your life miserable~”

”How weak~” Akuma thought.