The Hitachiin triplets. Troublesome brothers and their "angel" for a sister. But she was a demon herself. When the youngest, Shizu, is discovered by a Scout to be very capable in the arts of kendo and karate as well as her manipulative personality, she is taken to Darkthorne Academy. DTA is an istitution for girls who are too good for their own sake. It's a place where their talents are taken advantage of. Shizu and her Scout mentor, Miyuki, who's is gifted with powers over snow and water, go to Ouran Academy to track down the elusive Black Demon. When Hikaru and Kouru Hitachiin see what DTA has done to their baby sister, they are determined to keep her from going back. What will it take to get Miyuki to see the light? With the Black Demon be found? Shizu is young, but anyone can try.