Yuuichi Aizawa hasn't seen his aunt Akiko in 7 years, but now that his parents have moved to Africa to pursue their jobs, he's returned to the little northern town. Yuuichi, on the other hand, is not delighted about the thought of staying here because all of his memories of this location and the people who live there have inexplicably gone. His adorable cousin Nayuki appears to be a stranger as well, despite the fact that he used to play with her all the time when they were little. Yuuichi begins unpacking his new house on the day of his move and comes into a red headband that no one appears to recognize. This is one of the initial hints that would compel Yuuichi to act.