Mitsuki loves singing, but a malignant tumour in her throat has prevented her from pursuing her passion. However, Mitsuki's life turns around when two fun-loving Shinigami appear to grant her a temporary reprieve from her illness, and give her singing career a magical jump-start.

Mitsuki has previously refused the operation that would save her life, at the expense of her voice. However, as Mitsuki gets closer to her first concert appearance, Ms. Oshige decides that she will put Mitsuki in the hospital after the event, no matter how Mitsuki feels about it. Even so, it may be too late to save Mitsuki's life, unless Takuto and Meroko are successful in changing her fate.