Sweeping, cinematic Touhou fan arrangements mixed with original compositions that tackle ocean ecology through bullet hell. Gaia Organism Demand is the OST for Touhou Koi-Mystery, a 2021 fangame starring Koishi on some kind of underwater oxygen curse arc.
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"Earth Epic" lives up to its name with this massive, layered intro that sets the mythological scale immediately. "Paleontological Heritage" stretches across 4.6 billion years of geological history and the music actually sounds like it.
"Zazas Nasanazas" is the fun one, bouncy and chaotic in that classic Touhou boss-fight way. The bilingual Chinese-English track titles are a whole vibe. If you're deep in the Touhou fangame scene and want something with environmental themes and genuinely ambitious arrangements, this delivers.