Ultra Maniac & OVA

Summary: 

    Ayu Tateishi is a well-adjusted 7th grade student, until the fateful day when she finds the crying Nina Sakura outside the school, looking very dejected. Nina explains that she lost something very dear to her earlier during the day so, Ayu, being a kind girl, offers to help Nina find her lost item. The girls hunt for Nina's lost mini-computer, which is eventually found by Ayu. To repay Ayu for her kindness, Nina struggles to decide whether to let Ayu in on her 'big secret'. Nina is actually from the Magic Kingdom and is a magic-using witch. However, Ayu doesn't realize this immediately, being sort of clueless with computers and merely thinking that Nina is somewhat geeky. Nina struggles with her secret overnight, and in the morning before school confides her secret in Ayu. Of course, Ayu doesn't believe her, since magic is the spice of fairy tales in the real world. The story continues as friendship between Ayu and Nina blossoms, romance between Ayu and Kaji grows, and Nina's magically-inclined friends visit from the Magic Kingdom, to the chagrin of all involved.

The anime adaptation starts after Ayu and Nina have met, and Nina has come to earth to find the five "Holy Stones". Whoever collects all five will qualify to marry the prince of the Magic Kingdom. Nina's childhood friend Maya is competing with her to find the stones, but Nina is able to collect them all. When she learns that the prince and Maya are truly in love with one another, Nina decides to give the stones to Maya so they can be together.