Louise is a 16 year old attending Tristein Academy in a distant world with two moons and magic. She's not the best mage and the annual 2-year familiar summoning ceromony is when she wanted to prove herself, but unexpectedly she summoned a common earth boy, Saito.
All is not lost, because it turns out that Saito and Louise have a bond that transcends time powers that unlock ancient legends no one still believed. Also there's comedy, adventure, and romance.
Louise and Luise are, respectively, French and German feminine forms of Louis. Louise has been regularly used as a female name in English speaking countries since the middle of the 19th century. It has ranked among the top 100 names given to girls in France, England, Ireland, Scotland, Sweden and Wales in recent years. It last ranked among the top 1,000 names for girls born in the United States in 1991.