Bottle Fairy

Bottle Fairy, also known as Binzume Yousei, is a 2004 anime series that follows the daily lives of four fairies living with two humans in a university setting. The fairies, each represented by unique colors, consist of Kururu, Chiriri, Sarara, and Hororo, who have varying personalities and quirks. Their limited understanding of the human world often leads to humorous misunderstandings, but they are guided and befriended by their human caregivers, a university student and a first-grade girl.