The original AIKISS before the sequels expanded the formula. This 2019 soundtrack is twenty tracks of after-school dating sim warmth, establishing the template that AIKISS2 and 3 would later build on. "恋しちゃった!" (I Fell in Love!)
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sets the whole tone in one bright, bouncy track. "こころの揺らぎ" (Heart's Wavering) adds emotional nuance, and "共鳴" (Resonance) deepens it further. "マジ卐" brings chaotic energy that breaks up the sweetness. The track names are refreshingly direct about their feelings.
"気分爽快(piano ver.)" closes with a stripped-back take that proves the melodies work on their own. If you ended up loving the AIKISS sequels, going back to this first soundtrack shows where all that infectious energy started.