One vocal theme stretched across four versions anchoring a small collection of scene BGMs. Nyuukan Nurse's 2004 Windows privilege CD leads with "Precious love" in full, short, instrumental, and karaoke variants, each one peeling back a layer of the arrangement.
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The BGM tracks are minimal mood pieces doing exactly what their labels say. "Reminiscence Scene" carries a quiet, reflective tone, while "Happening" adds a spark of nervous energy. Straightforward early-2000s eroge scoring, nothing fancy but functional.
Nine tracks total, most of the runtime belonging to that one song in different forms. If you're a completionist who collects bonus CDs from this era of visual novels, this is a small but characteristic example of the format.