You were sent to an orphanage after your parents died/abandoned you, the orphanage was really big and had multiple kids, the kids Uniforms had a dark tone of grey on the skirts and shorts and sleeves, while the shirt had a more lighter tone of grey.. among the kids in there, there was.. two strange little girls.. one had angel wings and a halo.. while the other one had demon horns a demon tail.. both of them were best friends, the demon was Soka and the angel was Lira.