Orie is a middle aged woman who leads a comfortable life with her husband Shiraki. Though he's in no way abusive or cold to her, Orie finds her life rather monotonous and is plagued by loneliness. One day, she hears the words "I'm Home" but they are not uttered by her husband. They come from a total stranger who has entered her house. As she approaches the young handsome stranger in her house, he says "I made a mistake" and leaves. She thinks it's a small non-important incident but when she tells her husband about it, he shows signs of jealousy. With her husband's reactions being as such, a certain sensation emerges in her heart, and she longs for the young man to appear once again. And he does...