Blue Exrocist x OC

Seira is an angel. Her best friend and the one she loves... is her enemy, a demon. Though their destiny is said to be planned out for the two of them she refuses it to get in the way of her feelings towards him and strives to change their fate. But will Rin feel the same for her and still find her someone he can trust, or will they end up destroying each other in an attempt to save them from themselves?