Chinatsu No Uta

the series takes place at a certain japanese location, where a girl moves in with her aunt to a new house after experiencing some more or less shocking events back home. there she meets a boy named fuyuki, who she from then on spends a lot of time with. the thing special about chinatsu is her voice, a voice which many seem to have heard before, but from where? what's so special about this girl, and what'll happen in the future?