Shadow Star, known in Japan as Narutaru (なるたる?), which comes from the abbreviation of "Mukuro Naru Hoshi, Tama Taru Ko" (骸なる星 珠たる子?) (meaning roughly corpse of a star; a precious child), is a Japanese manga series created by Mohiro Kitoh, originally serialized in Kodansha's seinen magazine Afternoon.
The protagonist of the series is a twelve-year-old girl named Shiina Tamai. She bonds with a starfish-shaped "dragonchild" (baby "shadow dragon") whom she calls Hoshimaru. The series is mainly about the interaction between Shiina and other young people who have also bonded with dragons.