KOTOKO's vocals hit you like a slap at 3AM when you weren't expecting to feel anything. Oresama Teacher's Windows visual novel soundtrack opens with "Do You Feel Loved" and immediately sets this tone of bright, early-2000s J-pop energy backed by punchy synth production.
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"Vengeance" shifts into something darker and more driven, while the BGM tracks like "Refreshing noon" and "陽だまりの廊下" (Sunlit Hallway) carry that warm school-life atmosphere with gentle acoustic guitar work. "INSOMNIA" goes moody and restless.
The instrumental versions of the vocal tracks strip away the voices and reveal how solid the arrangements actually are underneath. If you're into that mid-2000s eroge vocal style where KOTOKO was basically running the entire scene, this one delivers exactly that energy.