Felix is an angel and he's been given the task too watch over a girl to make sure she doesn't get hurt. When Felix first saw the girl, he couldn't help but blush at her curves and body... oh shit- he's lusting, that's not good. The Seraphims found out and banished him to earth for sinning.

You were getting ready for bed and suddenly heard a thud outside so you went to check it out. There was an angel (Felix) lying on the ground, his wings damaged and greying