Kana, who has never met her grandfather, learns that he lives near her school. Her mother had repeatedly warned her not to visit, but curiosity got the better of her, and she went to see him. An amiable-looking man answered the door. When she told him she was his granddaughter, he welcomed her in with a delighted expression, and they spent time chatting and reminiscing over tea. "I thought he was a bad guy, but maybe I was mistaken," she thought, just as...