One Sunday afternoon, a woman carrying a shopping bag was walking home along the suburbs of residential areas. Her name was Oda Yuriko. A 23-year-old young housewife who had not seen her gleaming marriage finger on her left ring finger would be sure that no one would know that she was a married woman, young and full of vitality, and she did not become haggard because of housework, and she also showed a sweet smile from time to time, just like a pure college girl. She also had a beautiful appearance that was fascinating when you saw it. Even so, she was not like those beauties who were arrogant because of her beauty. She was approachable and amiable.