A Sparkle in the Darkness

Aki Hoshikurai is an ordinary and happy 15 year old girl untill the day she is infused with the power of darkness and forced to become a creature of darkness against her will by the forces of evil. But things don't go as they expect and she becomes a creature of darkness called a Dark Angel and manages to keep her self from being controlled by them. She escapes and returns home where she trys to keep her new found powers a secret and live a normal life with her family and friends like she used to. But then a day later she is attacked by one of her friends, Haruto Junsuihikari, who reveals him self as Purifier and now thinks of her as evil until he witnesses her use her powers to save a little kid from being hit from a car. He realizes that he is wrong and trys to help her find a way back to turn back to normal as his power doesn't seem to work on her like it does on other creatures of Darkness.