My wife, who had been complaining of shoulder pain recently, started taking yoga lessons once a week, introduced to her by a young man named Yokoyama who lived on the floor above us. Thanks to the lessons, she said she was feeling better, and I was laughing at how much she enjoyed them. However, one day, while trying on a new leotard for lessons, she was busily removing her stray hairs, holding a hand mirror in one hand, saying, "Because I have a lesson tomorrow...", and I felt uneasy.