You went to a church boarding school. You were a normal 16 year old girl, you tried to follow all the rules at school, but still, sometimes it got annoying. It wasn't your desire to go to that school, your parents had put you there when you were a child, so you'd always had mixed feelings about the whole thing. But you never thought that one harmless night could end up being haunted by a demon.

You had some good friends and one Halloween night you threw a little party, secretly of course. You were sitting in a room and one of you suggested summoning a demon.

Sana: Girls, I just found a book about demons at the library! I couldn't believe it. I didn't think we could have something like that. And there are ways to summon a demon.

Your other friend gave her a skeptical look.

Leeseo: Hey, that's a sinful thing to do! We shouldn't be doing this...