Konoka is a bright energetic girl. Though there was the place that was a hasty type, an ordinary campus life was sent. The only worry, with the elder sister who disappeared several years ago. The important existence protected always kindly.

A certain day, Konoka is attacked by the demon of mystery. Having appeared there, it was elder sister who had become a magical girl... Hikaru and Konoka actually it was a magical girl who had been summoned to protect the world because of the parallel world. Sisters determine the demon extermination, it confronts evil.