The Devil Crow

Normally, Aya is a reporter who report the news in Jakarta. But Aya have dragged to a place was called "Gensokyo" by mysterious gap. It leave her no choice except stay and live in Gensokyo with another living creature. But Aya is turned into a crow as She come to Gensokyo, and it gives her a power, such as flying or turning into whole crow or even sounds like it. But why she?