Bright, sugary J-pop vocals over cheerful PC game backing tracks. Berry's Characters Collection: Sweet and sour is a Windows visual novel from 2013, and the soundtrack is six character songs that lean all the way into idol-style pop.
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"Saikou no Stage!" opens with that big sparkly energy, upbeat and polished. "Dokidoki Shiteru" has a faster tempo and more urgency, the kind of track that sounds like a confession scene set to music. "Koisuru Sweets" closes the set with something softer and sweeter.
It's a short tracklist but each song commits fully to the aesthetic. Pure character-driven vocal pop with no pretense about being anything else. If you're into visual novel character songs and want something light and catchy, this delivers exactly that.