My Opposite Came To Visit

A young girl named Maki lived in Tamakorino City. On Maki's Fifteenth birthday she found a strange looking gem in the park and she kept it ,but later she found out that it gave her powers who she couldn't understand. She has been using her powers for good but she had never thought that she would have to use her powers on herself. Or in her case on her Opposite from a different dimension.