Riichi Yokomitsu, a big figure of a school of literature in Taisho and Syowa period, called neo-sensualism, wrote this book. The theme is about a life and death which is described by talking about human and fly. The coachman fall in sleep after eating Manjyu, steamed bean-jam bun, and fall off a cliff with the passengers. Just only a fly can survive during the accidient.