Murasaki Kagami.

Ten years ago, a group of girls hear this urban legend: A hideously burned girl will appear if you repeat the incantation, "Purple Mirror," five times in front of the mirror at 11:35 at night. One after the other, they die mysterious deaths. Ten years later, students belonging to the school's tennis club stay at the school's old grounds for their training camp. Hearing of the rumor, they decide to repeat the incantation before the mirror for fun...