Full Moon wo Sagashite

Young Mitsuki loves singing and dreams of becoming a pop star. Unfortunately, a malignant tumor in her throat prevents her from pursuing her passion. However, her life turns around when two surprisingly fun-loving harbingers of death appear to grant Mitsuki a temporary reprieve from her illness and give her singing career a magical push start.
(Source: Viz Media)
Chapter count contains the oneshot Ginyuu Meika (2nd volume); also includes all interlude and 4-koma chapters of the retail volumes.