Story
IOEA - Institute of Extramundane activities
Before death, in fact anytime in your life an "angel" visited you and "marked" you, ever since you have been able to seen angels or the living dead. You die shortly after you are marked. When you die you are woken up again, in the strange building with a girl standing over you. She looks you in the eye. You've seen her before, she was the girl that marked you. You jump up. "You! What did you do to me! Ever since you marked me... I've been seeing things... things I shouldn't-" you stop talking. The girl smiles. "Your dead, welcome to the institute of Extramundane activities, I am sorry for what I did to you" a tear forms on her cheek
Plot
Basically, your dead(ish). You are a trapped angel, neither dead or alive. There are many others like you, trapped on earth. Normal humans cannot see you, only marked humans and angels. Your goal? You must mark as many people as possible. Everyone has a number of people they have to mark, that number is unknown, but once you reach that number, you die, for real this time. Your body burst into flames (kinda like daemons in the golden compass) You may want to live eternally in the IOEA, die or just see where life takes you.