Kyousougiga

Deep in Kyoto lies the "mirror capital," a place where humans and youkai coexist and death never comes. The city is watched over by three guardians-Kurama, Yase, and Myoue-who wait for the return of their parents, Myoue Jonin and Koto. One day, a red-eyed girl named Koto (spelled differently) arrives with her little brothers, A and Un, searching for her mother. She comes from another world, loves mecha, and no one can tell if she’s human or youkai. Her presence disrupts the fragile peace that has held the city for so long.