The life in heaven And Earth

This is a story about a girl named Serenity.
She dies from cancer and goes to heaven and has her adventure in heaven along side with Mrs.
Helen who helped her through Cancer on Earth.
In Heaven, She meets a boy and he looks very familiar to her but she can't put her finger on it....
He follows her and Mrs. Helen along the way.
His name is James. He has dark black hair with blue eyes. He has horns and white wings.And he's a half demon. If he was a half angel, he would have dark wings and a Halo but being a half angel is rare because in order to be a half angel you have to have done something really really good on Earth or Heaven. And these days, barely anybody does it.Once you've been in heaven for a year, you can't be turned into a half angel. Having a Halo has to be earned if your not a half angel. And to earn a Halo, you have only five years. To earn a Halo, you have to do something that will "change heaven history" As you may think, people who have earned halos were pretty famous in heaven and was very rare. Mrs. Helen is actually a half angel because she worked at a hospital and volunteered to help and donate money to people who have Cancer.
In total, she donated about 20k to 40k in her life time.
Yeah. She deserves it.