Full Moon o Sagashite is a based on manga with the same title by Tanaemura Arina. The story focuses on 12-years old Mitsuki who loves to sing and wants to become a singer. However she has a tumor on her throat, which might only be cured at the cost of her voice. Her time is running out because she has only one year before she loses her voice.
In order to realize her dream to become a singer, she transforms into a 16-years old girl with help of Shinigami (god of death from japanese mythology) and took a singing audition. Of course she passed the audition and starts singing. But her time is running out as she only has one year before she can’t sing anymore…