Nina Yamada is a junior high 7th grader who dreams about a boy who is strong, handsome, and kind enough to protect her. One day, Nina "accidentally" swallowed a Crystal Pearl
that she assumed was candy. But the Crystal Pearl was the goal of a sorcery examination. Nina becomes the new target by many probationer sorcerers and goes on for half a year. During this whole mix up, she meets two wizard boys named Zero and Ichii and comes to a conclusion that they can protect her until a potion is made to remove the Crystal Pearl from her. However, this potion will take about 6 months to complete. Despite how long it took they decided to protect her no matter what. Even at school and at home, Zero and Ichii protect Nina where ever she goes.