Hoshina Hikaru is a second-year middle school student who loves space! One night, as she was drawing some constellations, she met a mysterious fairy. She got warped to space for a little bit before waking up the next morning, thinking it was all a dream. But it wasn't so, so Hikaru proceeds to name the fairy "Fuwa". She meets two aliens: Lala and Prunce who came to Earth to find Fuwa but a bad alien, Kappard had followed them to get Fuwa first. But Hikaru transformed into the legendary warrior, Cure Star to protect Fuwa.