A 12 year old girl who wants to become a singer. It is her dream, and also her promise with Eichi-kun, her lost love. Tragically, she suffers from throat cancer... she is then greeted by two shinigami, Meroko and Takuto. Together they embark on a journey to make her singing dreams come true and defeat all odds of her cancer. Mitsuki will lose love and find new love. Throughout this journey her heart and voice will keep on singing.