Her home town burned to ground and her parents killed by the abrupt appearance of the "Red Demon", Aika Amagami was left orphaned and alone, to fend for herself in this brutal world. Aika was born with a special power named [BRAVE] and noticing her potential an educational institution by the name of Hououin Academy scouts her. It would seem that at this academy, there are other young men and woman like herself, [BRAVERS], who are ardently honing their skills in rivalry. In order to grow stronger and exact her revenge on the "Red Demon", Aika enrolls at Hououin Academy...