Neko Neko Nihonshi

When what looks to be a cluster of shooting stars appear in the sky, Rinko Kougyoku and her friend Minami each make a wish. What the girls truly saw were not stars, but 'Jewel Charms' falling to the Earth. These charms were created by three magicians in a magical world names Jewel Land, each housing one of its many native Jewelpets. Although these creatures are free to roam the world in their original form, the magicians sometimes turn them into charms so that they can be carried around with great ease. Most Jewelpets don't find this troublesome, but once a mischievous bunny by the name of Ruby feels overly claustrophobic, she devises her escape. One day, the magicians decide to move the Jewelpets, and task a pelican with delivering them to the Dream Forest. All is well until a strong gust of wind disorients the bird, who then drops all of the charms that he was carrying. Instead of heading towards the Dream Forest, all the Jewelpets but Ruby fall to Rinko’s home city on Earth. Someone must go and retrieve them all, and as Ruby was the worst-behaved of the bunch, she is given the task of going to Earth. When Ruby reaches Earth in the form of a red Jewel Charm, she falls into Rinko’s water glass, and thus begins a rather unexpected adventure. Rinko, Minami, and Ruby form an alliance to search and gather all of the fallen charms, encountering strange creatures and tons of helpful allies along the way. Will they be able to succesfully bring the Jewelpets home safely, or is Earth full of more danger than they had expected?

OVAs bundled with volumes 42, 43 & 46 of the Aa! Megami-sama! manga.

Mint is a girl who happens to be the princess of the world of dreams and magic. The natural environment of her world is a reflection of the dreams of the people on Earth. It is now in danger as people lose faith in their dreams and let darkness enter their hearts. The environment of Mint's world is starting to wither and die. On her 12th birthday, after a gala celebration with her father the King and her mother, she agrees to go to the world of humans to try to preserve people's hopes and dreams, and to prove that she has the qualities necessary to be a wise ruler. Her father arranges for her to stay with his sister, Mint's aunt Herb, who runs a gift shop on Earth called "Happiness Shop". (Source: AniDB)