Ayato lives in a world that revolves around the power controlled by six powerful academies

Ayato lives in a world that revolves around the power controlled by six powerful academies. He used to live with his father and half-sister, whom he adored with all his heart, and promised to protect, but, five years ago, his sister went to the Seidoken academy and disappeared after a couple of months, never to be seen again. He lives with that guilt every single day, and has been surviving on the hopes of finding her sister again one day.