3 Years After the Horrific event known as the Grand Disaster, a red-haired boy named Satoshi Inomata returns home to the rebuilt city of New Allure in search of a voice calling out to him. Satoshi encounters Hanasu Nedena, a girl with an illuminating voice. In a world where people produce their life force known as Aura to perform uncanny feats, Satoshi & Hanasu quickly fall into the mystery surrounding their special abilities and the secrets that creep beneath the city.