Dark piano chords dropping into a Taisho-era murder mystery haze. CARTAGRA is an Innocent Grey visual novel, and this original soundtrack from 2005 carries the weight of every secret in its story. "恋獄" (Love's Purgatory) opens with this vocal arrangement that sets the whole tone, brooding and restrained.
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"月の涙" (Tears of the Moon) is pure melancholy piano that sounds like it belongs in a rain-soaked scene you can't look away from. Then "狂イ咲キ" (Off-Season Flowering) brings in something unhinged, flowers blooming where they shouldn't.
The instrumental versions of both vocal tracks are worth the listen on their own. Same bones, different weight. Grab this if you want a moody PC visual novel score that knows how to make piano feel dangerous.