When the school in Japan asked in her interview why she wanted to teach overseas, she didn’t give the real reason: that it had been an ear infection. Her parents had rented a lake house for early July. The first day, water had gone into her ear and had stayed in, resisting head shakes and leg kicks. She was the oldest of four. When she was younger, relatives called her “Young Mother Hen” because she changed diapers, helped with homework, and, later, drove her brothers and sister to thei...