I'm your angel (Eren x Reader)

You are a guardian angel.
The Guardian Angel are here to protect the people which can't it by themselves (or doesn't want to) and follow their instructions.
When it is decided that you will be in use for a boy called Eren Jäger, you don't think it´s a big deal.
But what if suddenly there is more than the normal binding between guardian angel and human?
Read to find out!