Mitsuki Kouyama's dream is to become a singer, and she promises that her dream will come true with Eichi-kun, her lost love. Tragically, she suffers from throat cancer and is later 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 loses love and finds new love. Throughout the journey, her heart and voice keep singing.