In order to solve the case of the disappearance of a female student, a female ninja named Yukiko Kurone infiltrates Asukayama Academy. It was a snowstorm that made him suspicious of the school principal, but he couldn't get any evidence. One day, a snowstorm encounters suspicious men in the school building at night. A snowstorm fights to capture the men and find out the truth of the case, but at that time, a monster appears. A blizzard that fights valiantly. However, the monster is strong and forced to be inferior. - Female ninja Fubuki grasps the truth of the case,