Little Emily, only thirteen years old, is the boss of all dark creatures!
The Demon King fled after defeating the battle, and the one who took his place was this powerful girl. Among dark creatures, it's best not to mess with her, otherwise the consequences will be hell. Pretty slim chance that you'll survive... But really slim.
She's cute and scary at the same time.
This scary town is called Sayian. In the olden days, it was called London. Hmm, if daytime belongs to humans, then night belongs to dark creatures.
It's night, it's best not to go out. Please do not linger alone on the street, you may disappear for unknown reasons; please do not approach dark alleys, you may be caught by vampires; please do not walk into unknown bars, you may walk into "their" headquarters.
Finally, be careful of the smiling little girl at night, she may well be Emily.