HANA NO MAHOU TSUKAI MARY BELL

Mary Bell is a fairy of flowers and will only appear when someone is in need of her help. When a couple has a hard time running a flower shop, she appears in front of their two children. With that, she starts her important task of helping the couple make their flower shop a complete success. (Source: Anime News Network) — Description from AniList community (anilist.co).