The Adventures of the Anzai Twins

Anzai Chiaki and Anzai Natsumi, two normal twin girls, lived a perfectly normal life with their parents on business trips most of the time. But one day, they heard a crashing noise in the attic, so they went upstairs to check it out. To their surprise they, they found two little injured pixies lying on their attic floor. The pixies told them all about what they were, who they were, what they did or could do, who they belonged to, and how they got separated from their former owners in a very intense battle, of course after they were healed. So, Natsumi and Chiaki decided to help the little pixies and act as their "masters" for the time being. In the process, they come across some terrible people that cause them very big trouble. Will the Anzai twins be able to help the pixies return home or will they face the terrible fate lying ahead of them?