Warm acoustic strumming fading into soft synth. Kono Aozora ni Yakusoku wo is a 2006 Windows visual novel OST that sounds like summer on a small island. "allegretto ~The Sky and You~" anchors everything with its breezy vocal melody, "Sunny Promenade" is pure walking-around-town warmth, and "Straw Hats that Blend into the Night Sky" makes you stop scrolling and just listen.
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The character themes have real personality. "TSUGUMI SEVEN" and "SAE-Chan's Staccato" feel distinct without breaking the overall mood. There is a piano version of the main theme that somehow hits harder than the original.
If you want a soundtrack that feels like the last week of summer vacation, this is the one.