"Ken, an ordinary demon from Agaren travels to Earth to finish his school year and get an graduations. However, he is not the only demon who came to earth to graduate."
"An ordinary demon with an extraordinary job - High School Life" is an extra story that plays in an Alternative Universe. In this Universe, Ken and Lyra haven't meet before, like in the comic. They first meet in the human world on a High School.
I suggest you read the webcomic first. This is a just for fun project, that's why (e.g.) I don't explain how the characters look like, since their appearance is shown in the webcomic.
I want to remind you guys, that my mother tongue is german and not english. So you will probably find some mistakes.
Extract:
The summer holidays are now almost just around the corner. Only a month left until the six week vacation begins. Most students have already lost interest to concentrates on their lessons. I am an exemplary student and I can't afford such a behavior.
Well, to be honest, I'm actually not even a human being. My name is Lyra and I am an archdemon. I'm the daughter of the Great Archangel Michael and a demon lady named Kayla. My father and I have argued a lot lately and then he suddenly forced me to do something meaningful. I should finish school in the human world to get a graduation. In the human world, I can begin an education and exercise a profession, but in the demon world I have no use for it.
Well, whatever. I will go through this last year and then it's fine. After that I can go back to Agaren. Luckily my friend Anubis accompanied me. Without him I would feel kinda lonely here. He says that he has accompanied me voluntarily, but I believe he was actually forced by Ra, to do a graduation too. Anyway. (...)