Hidden beneath the ordinary streets of Tokyo, eighty-five Beastmen search for the Keepers destined to awaken their true potential. Together they are forced into a deadly tournament where every victory comes at the expense of another. But Sumire Yukishiro was never supposed to exist. Quiet, compassionate, and burdened by a loneliness she keeps hidden behind a gentle smile, Sumire possesses a resonance unlike any other. As allies become friends and enemies become something far more complicated, the rules of the tournament begin to unravel. In a city where everyone is told to fight alone.. What if all it takes is a quiet meeting in the rain for every piece to fall into place?