Kuroi Hitomi no Noir: Cielgris Fantasm

Noah was quietly plying with her friend Disteen, but as they were exploring a cave they accidentally release a demon who had been sleeping for a thousand years. As Disteen tells Noah to escape, he gets turned to stone. The goddess Nil then appears before Noah and tells her that her friend can be saved. And thus, Noah embarks on a quest to undo the demon's curse, but she has to defeat him within three years. As the game progresses, time also passes, and different events occur at different times.