A strange mouse that could speak came into Kirara-chan's room. It was her boyfriend, Night-kun, who had been punished by the moon goddess and had turned into a different person. After making a big fuss in the castle of stars to get the first star that would make his wish come true, he scattered the sleeping stars all over the place. "So it was pitch black tonight, with not a star to be seen." Until he catches the escaped stars and restores the night sky to its original state, Night-kun will not be able to return to his human form. "But I can't collect stars in my tiny little form! Please, Kira-chan. Please, Kira, collect the lost stars for me! Please help me!" I can't leave my friend in trouble. Kirara is a kind girl. She puts on her magic shoes and jumps from the window of her room! Thus began Kirara-chan's great adventure.