For love, however powerful, cannot always survive the human beings who inhabit it.… The rain had been falling since early morning when Emily, a 36-year-old owner of a small flower shop, first realized that the man she loved was no longer the man she had believed him to be. For seven years, she and Daniel, a 40-year-old architect, had built a life together in a quiet neighborhood of Tokyo. Their relationship had begun almost by accident. He had walked into her flower shop one autumn afternoon, looking for a bouquet for his mother’s birthday. He returned the following week, then the week after that, until eventually he stopped pretending that flowers were the reason for his visits. Daniel was a thoughtful man, and Emily admired his restraint, his intelligence, and his ability to remain calm when everything around him seemed to fall apart. He, in turn, loved her warmth, her spontaneity, and the way she could find beauty in things that other people overlooked. They...