Sweet Rain’s New Single Rainbow Melody: A Gentle Journey into Summer’s Heart In Rainbow Melody, Sweet Rain stays true to his signature style while introducing richer orchestration as the song progresses. The title track “Rainbow Melody” captivates with its growing orchestral layers, creating a warm, immersive experience. The additional track, “Unacquainted,” reflects the melancholy of encountering unfamiliar emotions, using a repetitive melody to echo the sadness of unexpected farewells and partings. Together, these tracks bring a quiet yet profound summer ambiance to Sweet Rain’s latest work.