Shikimori Kazuki is a seventeen year old high school student that attends the wizardry training school, Aoi Academy. Everyone in this day of age from infants to the elderly possesses the ability to use magical powers. However, not everyone has the same level of magic power as there is a set number of times someone can use magic in their life. If anyone exceeds this limit it means they will die turning into dust. Because of this people's worth is often determined by the number of times they can use magic. Kazuki can only use magic seven times in his life causing his self worth and grades at the schools to be near the bottom of the barrel. Despite this, three skilled beautiful girls all want Kazuki for themselves because he posses genes that may allow his offspring to become the most powerful magician in existence.