Judging from what a translation of this song says if you google "Hybrid rainbow and go to that fansite", it's definitely a story of lost love. The lyrics apparently speak of the writer filling his mind with the memories of this girl who's no longer with him and how he(presumably) can do nothing but think of her and yearn to hear her voice. If the translation is right, the lyrics are pretty evocative.
Judging from what a translation of this song says if you google "Hybrid rainbow and go to that fansite", it's definitely a story of lost love. The lyrics apparently speak of the writer filling his mind with the memories of this girl who's no longer with him and how he(presumably) can do nothing but think of her and yearn to hear her voice. If the translation is right, the lyrics are pretty evocative.