JEWELPET MAGICAL CHANGE

The story follows the rabbit-shaped Jewelpet Ruby and the other Jewelpets on their mission to restore the Jewe Castle, which had fallen from the skies into the middle of the town because of humanity's lack of faith in magic. In order to rekindle human's "magic-believing hearts," Jewelpets transform into humans and come down to earth to study them. (Source: Anime News Network) — Description from AniList community (anilist.co).