Eerie music box tones that shift into something genuinely dark. Koi Suru Shoujo to Omoi no Kiseki is a 2014 Windows visual novel with a doll-themed soundtrack that plays the cute-sinister line perfectly. "Ningyoutsukai" has this puppet-master tension running through it, all plucked strings and careful pacing.
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Then "Kuroki Honoo" drops the pretense entirely and goes full dramatic heat. Between those extremes, "Gakusei Genkeishi no Nichijou" keeps things grounded with a light school-life feel. The tracklist moves from daily comfort into obsession and flame and departure.
That progression from gentle to desperate, ending on "Akaneiro no Kiseki"... If you want a VN soundtrack that knows how to make dolls feel unsettling without ever screaming about it, this one delivers.