Undiscovered power..

Miku was the person who was chosen by the song. The melody atracted her. She was the chosen one. She got the power. But she doesn't know how to control it, nor if it is good or bad. Once she enters the forbidden room, she got to know more. But will she use her power for the good, or the bad? And will she be able to help everyone, or is she going to leave them up to fate? What will she do..?