Eternal Sorrows

Ancriad just became a school for Mortals, those without powers and Minimums, those with powers. Not only that, everything is now decided with Games in where you bet something you think has the same value as what you opponent have; be it your life. Sawada Tsubasa is a Minimum that had his life turned upside down. But why does the transfer student look like his dead brother, Tsuna?