Late 90s anime synth-pop that just radiates that specific OVA warmth. Koi no Rhythm's soundtrack has this bright, bouncy J-pop core with the title track "恋の律動" laying down a catchy vocal hook that cycles through multiple versions across the album.
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"ムーンライトシャワー" slows everything into this dreamy ballad territory with soft keyboard pads that scream 1998 production. The battle themes (或り得ないバトル I through III) shift gears with surprising energy, stacking tension over punchy percussion.
Then it just... ends with a karaoke version of the opener. Thirteen tracks of pure late-Heisei mood. If you collect OVA soundtracks or dig that pre-digital-era anime pop sound, this one slots right in.