In Japan, which is surrounded by the sea, it takes time, but it is a ferry that can be moved cheaply. In particular, the route between Nagoya and Sendai and Hokkaido boasts two hundred thousand users per year. In the spring when people start a new life, the ship is filled with a variety of "facts" such as workers moving to Nagoya, which is booming, university students who complete a graduation trip in a cheap and easy country, and a group of dispatched employees who boarded in search of "a relaxing time". What is the current situation in Japan that emerges from the encounter on the ship for three days?