Full Moon o Sagashite

Full Moon o Sagashite manga summary: Mitsuki loves singing, but a malignant tumor 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. Includes a short story called Ginyu Meika in volume 2. Akiyoshi Kiryuu attempts to practice for an upcoming piano competition; however, his practice continually gets interrupted by a girl named Kanon, who claims to be the spirit of a tree.