A oneshot I made inspired by a couple tumblr posts about Destiel. Enjoy.

"Cas! Cas can you hear me?!" Dean was kneeling next to the angel, his friend, a bloody, bruised mess.
"D...Dean... I cant... I cant feel my wings... I cant..."
"Shh its okay Cas... I'm here, I've got you..."
"Dean... Dean I'm... Am I.. Dying..?"
The man choked, unable to form words.
"You're going to make it through this Cas. You're going to be fine." A lie.
"Dean... Im sorry..."
"No dont say that. You don't need to be sorry."
The angel's breath became more and more unsteady and his eyelids began to flutter.
"No Cas! No hang on, dont leave! Please..." The hunter ducked his head, unable to stop the tears from peppering Castiel's trench coat.
"Dean... Do you remember... That song...? You sang it once... You said your mom sang it to you before... Before you went to sleep..."
"What about it?"
"Can you... Sing it?" Dean nodded, taking a breath and trying to calm himself down.
"You... You are my sunshine.. My only sunshine..."
Cas' breathing became slower and softer.
"You make me... Happy when skies are gray..."
His eyelids became unbearably heavy and the pain in this chest began to numb.
"You'll never know dear, how much... I love you... So please..."
Cas' eyes fluttered closed and his chest ceased to move. Dean choked, unable to breathe. Scorching pain burned his chest and he bit back a scream. Black scars now decorated Dean's chest, the imprint of a small part of Cas' large black wings. The pain still stung his skin and a sob shook the hunter's chest as he finished the song.
"Please... Dont take my sunshine... Away..."