My serious-minded wife had long detested Mr. Ikeda, the resident in the apartment next door who exuded a visibly menacing aura. From smoking in the common areas to talking loudly on his mobile phone and ignoring trash sorting rules, my wife, who served as an officer in the neighborhood women's association, was always on edge because of him. However, a while later, from the day she visited Mr. Ikeda's home with a "petition for improvement" signed by all the residents, her attitude began to change...