COLD BUTTERFLY opens this soundtrack with a moody vocal hook that sets the entire tone for what follows. sei sho jyo is a 2013 Windows visual novel and its OST leans hard into atmosphere over flash, with piano and synth pieces that shift between uneasy tension and quiet melancholy.
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Odayakana Hikari floats with this gentle warmth that contrasts sharply against the darker tracks like Akui to Jounen, where the composition tightens up and gets unsettling. Ochita Hana closes things out with something that feels genuinely mournful.
Getting the Piano ver. of COLD BUTTERFLY at the end is a nice touch too, stripping everything back to just keys. If you play VNs for the atmosphere as much as the story, this one nails that slow-burn mood perfectly.