This 2015 visual novel delivers a massive 37-track package split between character image songs and scene-setting BGM, and the divide tells you everything about how seriously the production took its music. Each heroine gets her own vocal track -- "What is the EVIL" for Sena, "Wish your Happiness" for Kokone, "Be my darling!"
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for Fuuka, and the delicate "かすみ草のゆめ" (Baby's Breath Dream) for Airu -- and they all carry distinct personalities. The BGM side is where the craftsmanship really shows. "空の青、秋の風" (Blue Sky, Autumn Wind) and "Tea time" handle the gentle slice-of-life moments, while the tension suite is relentless: "一触即発" (Hair Trigger), "迫りくる刃" (Approaching Blade), and "影たちは舞う" (Shadows Dance) build from unease to outright danger.
"Cross the Rubicon" hits with the narrative weight its name implies. "カタストロフィ" (Catastrophe) and "BABEL" push into dramatic peaks, but the closing "君の音が聞こえる" (I Can Hear Your Sound) brings everything back to something warm and human.
The November setting bleeds through the whole score with an autumnal melancholy that ties it all together.